limited cutaneous systemic sclerosis

description: Limited cutaneous systemic sclerosis (lcSSc) is a subtype of systemic sclerosis (SSc) characterized by the association of Raynaud's phenomenon with skin fibrosis limited to the hands, face, feet and forearms.


limited systemic sclerosis

category: biolink:Disease biolink:DiseaseOrPhenotypicFeature biolink:BiologicalEntity biolink:ThingWithTaxon biolink:NamedThing

description: Limited systemic sclerosis (lSSc) (or SSc sine scleroderma) is a subset of systemic sclerosis (SSc) characterized by organ involvement in the absence of fibrosis of the skin.


name: marcothrombocytopenia with mitral valve insufficiency

description: Macrothrombocytopenia with mitral valve insufficiency is a rare hemorrhagic disorder due to a platelet anomaly characterized by dysfunctional platelets of abnormally large size, moderate thrombocytopenia, prolonged bleeding time and mild bleeding diathesis (ecchymoses and epistaxis), associated with mitral valve insufficiency.


name: attenuated familial adenomatous polyposis

description: Attenuated familial adenomatous polyposis (AFAP) is a mild form of familial adenomatous polyposis characterized by the presence of fewer than 100 adenomatous colonic polyps, a more proximal colonic location, a delayed age of colorectal cancer (CRC) onset and a more limited expression of the extracolonic features.


Joubert syndrome with ocular defect

description: Joubert syndrome with ocular defect is, along with pure JS, the most frequent subtype of Joubert syndrome and related disorders (JSRD) characterized by the neurological features of JS associated with retinal dystrophy.


familial primary hyperparathyroidism

description: An instance of primary hyperparathyroidism (disease) that is caused by an inherited modification of the individual's genome.


maternal phenylketonuria

description: Maternal phenylketonuria (PKU) is a rare disorder of phenylalanine metabolism, an inborn error of amino acid metabolism, characterized by the development of microcephaly, growth retardation, congenital heart disease, facial dysmorphism and intellectual disability in nonphenylketonuric offspring of mothers with excess phenylalanine (Phe) concentrations.


dermatomyositis

description: Dermatomyositis (DM) is a type of idiopathic inflammatory myopathy characterized by evocative skin lesions and symmetrical proximal muscle weakness.


Rothmund-Thomson syndrome type 1

description: Rothmund-Thomson syndrome type 1 is a subform of Rothmund-Thomson syndrome (RTS) presenting with a characteristic facial rash (poikiloderma) and frequently associated with short stature, sparse scalp hair, sparse or absent eyelashes and/or eyebrows, and rapidly progressive bilateral juvenile cataracts. In contrast to RTS2, patients with RTS1 do not appear to have an increased risk of developing cancer.


Rothmund-Thomson syndrome type 2

description: Rothmund-Thomson syndrome type 2 is a subform of Rothmund-Thomson syndrome (RTS) presenting with a characteristic facial rash (poikiloderma) and frequently associated with short stature, sparse scalp hair, sparse or absent eyelashes and/or eyebrows, congenital bone defects and an increased risk of osteosarcoma in childhood and squamous cell carcinoma later in life.


Marchiafava-Bignami disease

description: Marchiafava Bignami disease is defined by characteristic demyelination of the corpus callosum (erosion of the protective covering of nerve fibers joining the 2 hemispheres of the brain). The disease seems to most often affect severe and chronic alcoholics in their middle or late adult life. Early symptoms may include depression, paranoia, psychosis, or dementia. Seizures are common, and hemiparesis, aphasia, abnormal movements, and ataxia may sometimesprogress to coma and/or death. The cause of Marchiafava Bignami disease, including the potential role of nutritional deficiency, remains unknown. Improvement and recovery of some individuals has been reported. Treatment focuses on nutritional support and rehabilitation from alcoholism.


name: combined hyperactive dysfunction syndrome of the cranial nerves


glossopharyngeal neuralgia

description: Glossopharyngeal neuralgia is a condition characterized by repeated episodes of severe pain in the tongue, throat, ear, and tonsils (areas connected to the ninth cranial nerve, or glossopharyngeal nerve). It typically occurs in individuals over age 40. Episodes of pain may last from a few seconds to a few minutes, and usually occur on one side. The pain may be triggered by swallowing, speaking, laughing, chewing or coughing. The condition is thought to be due to irritation of the nerve, although the source of irritation is unclear. The goal of treatment is to control pain, but over-the-counter pain medications are not very effective; the most effective drugs are anti-seizure medications. Some antidepressants help certain people. Surgery to cut or take pressure off of the glossopharyngeal nerve may be needed in severe cases.


cranial neuralgia

description: A neuralgia that involves the cranial neuron projection bundle.


Pitt-Hopkins-like syndrome

description: Pitt-Hopkins-like syndrome is a rare, genetic, syndromic intellectual disability disorder characterized by severe intellectual disability, lack of speech with normal, or mildly delayed, motor development, episodic breathing abnormalities, early-onset seizures and facial dysmorphism which only includes a wide mouth. Abnormal sleep-wake cycles, autistic behavior and stereotypic movements are commonly associated.


name: maternal hyperthermia induced birth defects

description: Maternal hyperthermia induced birth defects is a rare maternal disease-related embryofetopathy characterized by variable developmental anomalies of the fetus due to teratogenic effect of elevated maternal body temperature (resulting from febrile illness or hot environment exposure). Reported developmental anomalies include neural tube defects (spina bifida, ecephalocele, anencephaly), cardiac defects (transposition of great vessels), urogenital defects (hypospadias), abdominal wall defects, cleft lip/palate, eye defects (cataract, coloboma) or various minor anomalies (e.g., bifid uvula, preauricular pit or tag). Consensus regarding cause-effect relationship has not been reached.


name: erosive pustular dermatosis of the scalp

description: Erosive pustular dermatosis of the scalp is a rare chronic inflammation of the scalp usually occurring in elderly women (>70 years old) and characterized by the development of painful pustules, shallow erosions, and crusting on atrophic skin that eventually result in cicatricial alopecia.


acquired hypertrichosis lanuginosa

description: Acquired hypertrichosis lanuginosa is a rare cutaneous paraneoplastic disease characterized by the presence of excessive lanugo-type hair on the glabrous skin of face, neck, trunk and limbs that can be associated with additional clinical features such as burning glossitis, papillary hypertrophy of the tongue, diarrhea, dysgeusia, and/or weight loss. It is associated with lymphoma or cancer of the gastrointestinal system, urinary tract, lung, breast, uterus or ovary.


hypertrichosis lanuginosa congenita

description: Hypertrichosis lanuginosa congenita is a rare congenital skin disease characterized by the presence of 3 to 5cm long lanugo-type hair on the entire body, with the exception of palms, soles, and mucous membranes.


nephrogenic diabetes insipidus

description: Nephrogenic diabetes insipidus (NDI) is characterized by polyuria with polydipsia, recurrent bouts of fever, constipation, and acute hypernatremic dehydration after birth that may cause neurological sequelae. Polyuria may exceed 10 liters in children.


name: hypogonadotropic hypogonadism-frontoparietal alopecia syndrome

description: This syndrome is characterized by the association of hypogonadotropic hypogonadism and frontoparietal alopecia.


name: hypogonadism-mitral valve prolapse-intellectual disability syndrome

description: This syndrome is characterized by the association of hypogonadism due to primary gonadal failure, mitral valve prolapse, mild intellectual deficit and short stature.


name: hypogonadotropic hypogonadism-retinitis pigmentosa syndrome

description: This syndrome is characterized by the association of hypogonadotropic hypogonadism (with primary amenorrhea and lack of secondary sexual development) and retinitis pigmentosa. It has been described in two sisters born to nonconsanguineous parents.


name: mitochondrial oxidative phosphorylation disorder


familial hypoparathyroidism

description: A rare heterogeneous group of metabolic disorders characterized by abnormal calcium metabolism due to deficient secretion of parathormone (PTH), without other endocrine disorders or developmental defects.


neonatal diabetes mellitus

description: Neonatal diabetes mellitus presents as hyperglycemia, failure to thrive and, in some cases, dehydration and ketoacidosis which may be severe with coma, in a child within the first months of life.


name: cerebellar hypoplasia-tapetoretinal degeneration syndrome

description: Cerebellar hypoplasia-tapetoretinal degeneration syndrome is a rare syndrome with a cerebellar malformation as a major feature characterized by cerebellar hypoplasia, bilateral retinal pigmentary changes, intellectual disability that can range from mild to moderate and pronounced language development delay. It presents with early developmental delay, central and peripheral non-progressive visual impairment or asymptomatic retinal changes, hypotonia, non-progressive ataxia and nystagmus.


name: hyposmia-nasal and ocular hypoplasia-hypogonadotropic hypogonadism syndrome

description: This syndrome is characterized by the association of severe nasal hypoplasia, hypoplasia of the eyes, hyposmia, hypogeusia and hypogonadotropic hypogonadism.


name: sporadic infantile bilateral striatal necrosis

description: Sporadic infantile bilateral necrosis is the sporadic form of infantile bilateral striatal necrosis (IBSN), a syndrome of bilateral symmetric spongy degeneration of the caudate nucleaus, putamen and globus pallidus characterized by developmental regression, choreoathetosis and dystonia progressing to spastic quadriparesis.


name: foveal hypoplasia-presenile cataract syndrome


pontocerebellar hypoplasia type 1

description: Pontocerebellar hypoplasia type 1 (PCH1), also known as Norman's disease, is a clinically and genetically heterogeneous group of autosomal recessive disorders with a prenatal onset characterized by diffuse muscular atrophy secondary to pontocerebellar hypoplasia and spinal cord anterior horn cell degeneration resulting in early death.


oligomeganephronia

description: Oligomeganephronia is a developmental anomaly of the kidneys, and the most severe form of renal hypoplasia, characterized by a reduction of 80% in nephron number and a marked hypertrophy of the glomeruli and tubules.


permanent congenital hypothyroidism

description: Permanent congenital hypothyroidism is a type of congenital hypothyroidism (CH), a thyroid hormone deficiency present from birth.


central congenital hypothyroidism

description: Central or secondary congenital hypothyroidism is a type of permanent congenital hypothyroidism characterized by permanent thyroid hormone deficiency that is present from birth and secondary to a disorder in the thyroid-stimulating hormone (TSH) - thyrotropin-releasing hormone (TRH) system.


name: hypothyroidism due to deficient transcription factors involved in pituitary development or function

description: Hypothyroidism due to mutations in transcription factors involved in pituitary development or function is a type of central congenital hypothyroidism, a permanent thyroid deficiency that is present from birth, characterized by low levels of thyroid hormones caused by disorders in the development or function of the pituitary.


peripheral hypothyroidism

description: Peripheral hypothyroidism is a type of permanent congenital hypothyroidism, a permanent thyroid hormone deficiency that is present from birth, that results from peripheral defects in thyroid hormone metabolism.


name: congenital hypothyroidism due to maternal intake of antithyroid drugs


name: hypotrichosis-intellectual disability, Lopes type

description: A syndrome characterized by hypotrichosis, syndactyly, intellectual deficit and early eruption of teeth. It has been described in two patients. The mode of transmission appears to be autosomal recessive.


diphallia

description: Two penile structures, separated from the tip to the base of the shaft.


name: multiple system atrophy, cerebellar type

description: Multiple system atrophy, cerebellar type (MSA-c) is a form of multiple system atrophy (MSA) with predominant cerebellar features (gait and limb ataxia, oculomotor dysfunction, and dysarthria).


hereditary breast carcinoma

description: Breast carcinoma that has developed in relatives of patients with history of breast carcinoma.


toxic oil syndrome

description: Toxic oil syndrome is a rare intoxication, due to consumption of a rapeseed oil denatured with aniline 2%, characterized by generalized vascular lesions affecting all organs and vessels (including veins and arteries) and presenting with severe incapacitating myalgias, marked peripheral eosinophilia and pulmonary infiltrates.


autoimmune polyendocrinopathy type 3

description: A rare, endocrine disease characterized by autoimmune thyroid disease associated with at least one other autoimmune disease, such as type I diabetes mellitus, chronic atrophic gastritis, pernicious anemia, vitiligo, alopecia, or myasthenia gravis, but excluding Addison disease.


name: progressive sensorineural hearing loss-hypertrophic cardiomyopathy syndrome

description: Progressive sensorineural hearing loss - hypertrophic cardiomyopathy is an extremely rare disorder described in one family to date that is characterized by progressive, late onset, autosomal dominant sensorineural hearing loss, QT interval prolongation, and mild cardiac hypertrophy.


Hughes-Stovin syndrome

description: Hughes-Stovin syndrome (HSS) is a life-threatening disorder, believed to be a cardiovascular clinical variant manifestation of Behcet's disease (BD). It is characterized by the association of multiple pulmonary artery aneurysms (PAAs) and peripheral venous thrombosis.


fusariosis

description: Fusariosis describes a superficial, locally invasive, disseminated infection with the pathogenic fungus species, Fusarium, often found in soil and water, which is mainly transmitted to humans through traumatic inoculation and that manifests with keratitis, onychomycosis and less frequently peritonitis and cellulitis. In the immunocompromised, disseminated fusariosis is more common and it manifests with refractory fever, skin lesions (ecthyma-like, target, and multiple subcutaneous nodules), severe myalgias and sino-pulmonary infections.


Marburg acute multiple sclerosis

description: Marburg acute multiple sclerosis is a rare variant of multiple sclerosis characterized by a rapidly progressive, aggressive form of multiple sclerosis with numerous large multifocal demyelinating lesions in deep white matter on cerebral MRI that usually leads to severe disability or death within weeks to months without remission. A relapsing form of multiple sclerosis is observed in surviving patients.


Balo concentric sclerosis

description: Tumefactive multiple sclerosis is characterized by a tumor-like lesion larger than two centimeters and signs and symptoms similar to those of a brain tumor. It is a rare form of multiple sclerosis (MS). Symptoms of tumefactive MS often differ from other MS cases and may include, headaches, changes in thinking, confusion, speech problems, seizures, and weakness. The cause of tumefactive MS is not known. It often develops into the relapsing-remitting form of MS. In other cases there is only one occurrence of the condition. In still others the disease process remains less clear. While there is no cure for tumefactive MS, treatments such as corticosteroids are available to decrease disease activity.


name: autosomal dominant Charcot-Marie-Tooth disease type 2M

description: Autosomal dominant Charcot-Marie-Tooth disease type 2M (CMT2M) is a form of axonal Charcot-Marie-Tooth disease, a peripheral motor and sensory neuropathy. CMT2M is characterized by congenital pstosis and early cataract associated to a mildly progressive peripheral neuropathy of variable onset from birth to the 6th decade, pes cavus, reduced to absent ankles tendon reflexes and sometimes neutropenia.


heart-hand syndrome

description: Heart-hand syndrome refers to a group of congenital disorders characterized by malformations of the upper limbs and heart. To date, heart-hand syndrome comprises the following rare syndromes; Holt-Oram syndrome; heart-hand syndrome type 2; heart-hand syndrome type 3; heart hand syndrome, Slovenian type, brachydactyly-long thumb; and patent ductus arteriosus-bicuspid aortic valve - hand anomalies.


name: dysmorphism-short stature-deafness-disorder of sex development syndrome

description: Dysmorphism-short stature-deafness-disorder of sex development syndrome is characterized by dysmorphism (including facial asymmetry, arched eyebrows, hypertelorism, broad and flat nasal bridge, microtia, small nose with anteverted nostrils, micrognathia), deafness, cleft palate, male pseudohermaphroditism, and growth and psychomotor retardation. It has been described in two siblings. It is transmitted as an autosomal recessive trait.


late-onset focal dermal elastosis

description: Late-onset focal dermal elastosis is a rare, acquired, dermis elastic tissue disorder characterized by a pseudoxanthoma elasticum-like papular eruption consisting of multiple, slowly progressive, asymptomatic, 2-5 mm, white to yellowish, non-follicular papules (that tend to form cobblestone plaques) predominantly distributed over the neck, axillae and flexural areas, with no systemic involvement. Skin biopsy reveals a focal increase of normal-appearing elastic tissue in the reticular dermis with no calcium deposits.


linear focal dermal elastosis

description: Linear focal elastosis is a rare, acquired, dermis elastic tissue disorder characterized by asymptomatic, palpable, hypertrophic or atrophic, yellowish or red, indurated, horizontal, striae-like linear plaques distributed symmetrically across the mid and lower back. No systemic involvement has been described. Skin biopsy reveals a focal increase in abnormal elastic tissue with abundant, wavy, fragmented and aggregated, basophilic elastic fibers in the reticular dermis.


elastoderma

description: Elastoderma is a rare condition that affects the skin. People affected by elastoderma generally have increased laxity of skin covering a specific area of the body. Decreased recoil of the skin has also been reported. Although any part of the body can be affected, the skin of the neck and extremities (arms and legs, especially at the elbows and/or knees) are most commonly involved. The exact underlying cause is currently unknown; however, it generally occurs sporadically in people with no family history of the condition. There is no standard therapy available for elastoderma. Some cases have been treated with surgical excision (removal of affected skin), but hyperlaxity of skin often returns following the surgery.


elastofibroma dorsi

description: A benign, slow-growing tumor arising from the soft tissues usually in the mid-thoracic region of the elderly. It is characterized by the presence of paucicellular collagenous tissue, adipocytes and a predominance of large coarse elastic fibers arranged in globules.


acquired pseudoxanthoma elasticum

description: A nonheritable form of pseudoxanthoma elasticum (PXE), lacking the retinal and vascular stigmata associated with the inherited form of the disorder, but having skin lesions that are clinically, histologically, and ultrastructurally similar to those seen in the inherited type.


papular elastorrhexis

description: An acquired form of collagenoma that appears in childhood. It is characterized by discrete, firm, skin-colored, and slightly elevated cutaneous papules, nodules or plaques that may be generalized, or found on the trunk and the extremities.


primary anetoderma

description: Primary anetoderma is a rare skin disease characterized by loss of elastin tissue resulting in localized areas of flaccid skin in the absence of a secondary cause.


familial anetoderma

description: Familial anetoderma is an extremely rare genetic skin disease characterized by loss of elastin tissue leading to localized areas of flaccid skin and a family history of the disorder.


acquired cutis laxa

description: An instance of cutis laxa that is acquired during the lifetime of the individual.


white fibrous papulosis of the neck

description: White fibrous papulosis of the neck (WFPN) is a rare, acquired, dermal elastic tissue disorder characterized by multiple, 2-3 mm sized, non-confluent, asymptomatic, white or pale-colored, non-follicular, firm papular lesions occurring predominantly on the lateral or posterior aspects of the neck. Other, rarely reported sites include inferior axillae, central mid-back and upper sternal region.


name: pseudoxanthoma elasticum-like papillary dermal elastolysis

description: Pseudoxanthoma elasticum-like papillary dermal elastolysis (PXE-PDE) is a rare, acquired, idiopathic dermal tissue disorder characterized by numerous, asymptomatic, 2-3 mm, yellowish, non-follicular papules that tend to converge into cobblestone-like plaques which are distributed symmetrically over the posterior neck, supraclavicular region, axillae, and sometimes abdomen. Unlike PXE, these skin lesions show select elimination (absence or marked loss) of elastic fibers in the papillary dermis and there is no systemic involvement.


autoimmune hemolytic anemia, cold type

description: Cold autoimmune hemolytic anemia comprises two types of autoimmune hemolytic anemia (AIHA) defined by the presence of cold autoantibodies (autoantibodies which are active at temperatures below 30B0C): cold agglutinin disease (CAD), which is the more common, and paroxysmal cold hemoglobinuria (PCH).


name: idiopathic hypersomnia with long sleep time

description: Idiopathic hypersomnia with long sleep time is a sleep disorder characterized by good quality night rest of 10 hours or more, excessive daytime drowsiness that is more or less continual with long episodes of non-restorative sleep, and difficult waking with sleep drunkenness or sleep inertia.


name: idiopathic hypersomnia without long sleep time

description: Idiopathic hypersomnia without long sleep time is a sleep disorder characterized almost entirely by constant excessive daytime drowsiness lasting more than 3 months, with involuntary more or less restorative daytime naps. Night rest is of normal length or slightly prolonged but is less than 10 hours in duration, with often normal awakening.


foodborne botulism

description: Foodborne botulism is the most common form of botulism, a rare acquired neuromuscular junction disease with descending flaccid paralysis due to botulinum neurotoxins (BoNTs). It is caused by consumption of contaminated food containing BoNTs.


Charcot-Marie-Tooth disease type 2B5

description: A rare axonal hereditary motor and sensory neuropathy characterized by infantile onset of slowly progressive distal motor weakness and atrophy (more severe in legs and moderate in arms) with mildly delayed motor development, hypotonia, and distal sensory impairment of all sensory modalities.


description: Virus-associated trichodysplasia spinulosa is a rare infectious skin disease characterized by the development of follicular papules with keratin spicules in various parts of the body, predominantly in the face (e.g. nose, eyebrows, auricles), that is due to polyomavirus infection in immunocompromized patients.


5q14.3 microdeletion syndrome

description: The newly described 5q14.3 microdeletion syndrome includes severe intellectual deficit with no speech, stereotypic movements and epilepsy.


name: ptosis-upper ocular movement limitation-absence of lacrimal punctum syndrome

description: Ptosis - upper ocular movement limitation - absence of lacrimal punctum is a recently described association of absence of the lower lid lacrimal punctum, bilateral ptosis, elevation deficiency of both eyes and mild facial dysmorphism.


8q12 microduplication syndrome

description: The newly described 8q12 microduplication syndrome is associated with unusual and characteristic multi-organ clinical features, which include hearing loss, congenital heart defects, intellectual disability, hypotonia in infancy, and Duane anomaly.


2q23.1 microdeletion syndrome

description: The newly described 2q23.1 microdeletion syndrome includes severe intellectual deficit with pronounced speech delay, behavioral abnormalities including hyperactivity and inappropriate laughter, short stature and seizures.


polyvalvular heart disease syndrome

description: Polyvalvular heart disease syndrome is a recently described syndrome characterized by the combination of polyvalvular heart disease, short stature, facial anomalies and intellectual deficit.


5q35 microduplication syndrome

description: The newly described 5q35 microduplication syndrome is associated with microcephaly, short stature, developmental delay and delayed bone maturation.


isolated agammaglobulinemia

description: Isolated agammaglobulinemia (IA) is the non-syndromic form of agammaglobulinemia, a primary immunodeficiency disease, and is characterized by deficient gamma globulins and associated predisposition to frequent and recurrent infections from infancy.


syndromic agammaglobulinemia

description: A agammaglobulinemia that is part of a larger syndrome.


insulin-resistance syndrome type B

description: Type B insulin-resistance syndrome belongs to the group of extreme insulin-resistance syndromes (which includes leprechaunism, the lipodystrophies, Rabson-Mendenhall syndrome, and type A insulin resistance syndrome) and occurs in the context of immune dysfunction.


asbestosis

description: A lung disorder caused by inhalation of asbestos fibers. It results in fibrosis of the lung parenchyma. Signs and symptoms include coughing, shortness of breath and chest pain.


isotretinoin syndrome

description: Isotretinoin embryopathy is an association of malformations caused by the teratogenic effect of isotretinoin, an oral synthetic vitamin A derivative, which is used to treat severe recalcitrant cystic acne. Exposure to isotretinoin during the first trimester of pregnancy has been associated with an increased risk of spontaneous abortions and severe birth defects including serious craniofacial (microcephaly, asymmetric crying facies, microphthalmia, developmental abnormalities of the external ear, ocular hypertelorism), cardio vascular (conotruncal heart defects, aortic arch abnormalities), and central nervous system (hydrocephalus, microcephaly, lissencephaly, Dandy-Walker malformation, cognitive deficit) anomalies and thymic aplasia. Isoretinoin is contraindicated during pregnancy.


toxin-mediated infectious botulism

description: Aform of botulism (see this term), a rare acquired neuromuscular junction disease, characterized by descending flaccid paralysis caused by botulinum neurotoxins (BoNTs), produced in vivo leading to toxin-mediated infection. Infectious botulism includes wound botulism and intestinal toxemia botulism (infant botulism and adult intestinal botulism).


name: Ehlers-Danlos syndrome, vascular-like type

description: Ehlers-Danlos, vascular-like type is an adult-onset form of Ehlers-Danlos syndrome characterized by spontaneous dissection of medium-sized arteries during young adulthood, including mainly the iliac, femoral, and renal arteries.


description: Ehlers-Danlos/osteogenesis imperfecta syndrome is an association of the features of Ehlers-Danlos syndrome and osteogenesis imperfecta, characterized by generalized joint hypermobility and dislocations, skin hyperextensibility and/or translucency, and easy bruising as the predominant clinical features, while being invariably associated with mild signs of osteogenesis imperfecta, including short stature, blue sclera, and osteopenia or fractures.


pachyonychia congenita

description: Pachyonychia congenita (PC) is a rare genodermatosis predominantly featuring painful palmoplantar keratoderma, thickened nails, cysts and whitish oral mucosa.


dracunculiasis

description: Dracunculiasis (Guinea worm disease) is a neglected tropical disease (NTD) characterized by a painful burning skin lesion from which the Dracunculus medinensis parasite emerges approximately 1 year after infection resulting from consumption of unsafe drinking water containing parasite-infected copepods (Cyclops spp., microcrustacea also called water fleas).


familial rhabdoid tumor

description: A neoplastic syndrome most often caused by mutations in the hSNF5/INI1 tumor suppressor gene. It is characterized by the development of an atypical teratoid/rhabdoid tumor in infancy and early childhood. This highly aggressive tumor develops in the central nervous system as an isolated lesion or in combination with extrarenal or renal rhabdoid tumor. Patients may also develop other central nervous system malignancies including medulloblastoma, supratentorial primitive neuroectodermal tumor, and choroid plexus carcinoma.


drug-induced lupus erythematosus

description: An autoimmune disorder, similar to systemic lupus erythematosus, that is caused by certain drugs.


name: Beckwith-Wiedemann syndrome due to imprinting defect of 11p15


name: Beckwith-Wiedemann syndrome due to CDKN1C mutation


name: Beckwith-Wiedemann syndrome due to 11p15 microdeletion


name: Beckwith-Wiedemann syndrome due to 11p15 translocation/inversion


name: silver-Russell syndrome due to 7p11.2p13 microduplication


name: silver-Russell syndrome due to an imprinting defect of 11p15


name: silver-Russell syndrome due to 11p15 microduplication


name: silver-Russell syndrome due to maternal uniparental disomy of chromosome 11


intracranial berry aneurysm

description: An intracranial aneurysm with a characteristic rounded shape; the most common form of cerebral aneurysm.


Usher syndrome type 2

description: A syndrome characterized by congenital, bilateral sensorineural hearing loss that is mild to moderate in the low frequencies and severe to profound in the higher frequencies, no abnormalities in the vestibular system, and retinitis pigmentosa.


Usher syndrome type 3

description: A syndrome characterized by postlingual progressive hearing loss, abnormalities in the vestibular system, and onset of retinitis pigmentosa symptoms usually by the second decade of life.


beta-thalassemia major

description: Beta-thalassemia (BT) major is a severe early-onset form of BT characterized by severe anemia requiring regular red blood cell transfusions.


beta-thalassemia intermedia

description: Beta-thalassemia (BT) intermedia is a form of BT characterized by mild to moderate anemia which does not or only occasionally requires transfusion.


delta-beta-thalassemia

description: Delta-beta-thalassemia is a form of beta-thalassemia characterized by decreased or absent synthesis of the delta- and beta-globin chains with a compensatory increase in expression of fetal gamma-chain synthesis.


hemoglobin C-beta-thalassemia syndrome

description: Hemoglobin C - beta-thalassemia (HbC - BT) is a form of beta-thalassemia resulting in moderate hemolytic anemia.


hemoglobin E-beta-thalassemia syndrome

description: Hemoglobin E - beta-thalassemia (HbE - BT) is a form of beta-thalassemia that results in a mild to severe clinical presentation ranging from a condition indistinguishable from beta-thalassemia major to a mild form of beta-thalassemia intermedia.


name: pharyngeal-cervical-brachial variant of Guillain-Barre syndrome


name: paraparetic variant of Guillain-Barre syndrome

description: Paraparetic variant of Guillain-Barré syndrome is a rare variant of Guillain-Barré syndrome characterized by isolated leg weakness, areflexia and radicular leg pain that may simulate a cauda equina or spinal cord syndrome. The arms, ocular, facial, and oropharyngeal muscles are spared, and sphincteric function is normal.


autoimmune autonomic ganglionopathy

description: A rare variant of Guillain-Barré syndrome characterized by acute post-ganglionic sympathetic and parasympathetic failure presenting several weeks after acute infection with gastrointestinal symptoms (abdominal pain, vomiting, constipation, diarrhea, gastroparesis, ileus), orthostatic hypotension, erectile dysfunction, urinary frequency, urgency or retention, vasomotor instability with acrocyanosis and reduced salivation, lacrimation and sweating.


acute sensory ataxic neuropathy

description: Acute sensory ataxic neuropathy is a rare variant of Guillain-Barré syndrome characterized by acute onset monophasic sensory neuropathy with diminished or absent tendon reflexes, loss of proprioception, positive Romberg sign and nerve conduction features of demyelination. It presents several weeks after acute infection with paresthesias, ataxia and neuropathic pain.


description: Hermansky-Pudlak syndrome with pulmonary fibrosis as a complication includes two types (HPS-1 and HPS-4) of Hermansky-Pudlak syndrome (HPS), a multi-system disorder characterized by oculocutaneous albinism, bleeding diathesis and, in some cases, pulmonary fibrosis or granulomatous colitis.


description: Hermansky-Pudlak syndrome without pulmonary fibrosis as a complication includes three relatively mild types (HPS-3, HPS-5 and HPS-6) of Hermansky-Pudlak syndrome (HPS), a multi-system disorder characterized by ocular or oculocutaneous albinism, bleeding diathesis and, in some cases, granulomatous colitis.


name: congenital erosive and vesicular dermatosis


primary unilateral adrenal hyperplasia

description: Primary unilateral adrenal hyperplasia (PUAH) is a surgically-correctable form of primary (hyper) aldosteronism (PA) characterized by renin suppression, unilateral aldosterone hypersecretion, and moderate to severe hypertension secondary to hyperplasia of the adrenal gland.


name: aldosterone-producing adrenal cortex adenoma

description: An adenoma of the adrenal cortex that produces aldosterone. It may be associated with Conn syndrome. Clinical presentation includes hypertension, hypokalemia, and muscle weakness.


ectopic aldosterone-producing tumor

description: Ectopic aldosterone-producing tumor is an extremely rare aldosterone-producing neoplasm composed of aberrant adrenocortical tissue located outside the adrenal glands (e.g. in retroperitoneum, perirenal or periaortic fatty tissue, thorax, spinal canal, testes, ovaries) typically characterized by symptoms related to increased aldosterone levels (such as sustained, treatment-resistant hypertension and hypokalemia) or symptoms caused by local tumor enlargement.


name: microcornea-posterior megalolenticonus-persistent fetal vasculature-coloboma syndrome


name: epibulbar lipodermoid-preauricular appendage-polythelia syndrome

description: Epibulbar lipodermoid B preauricular appendages B polythelia is a branchial arch syndrome described in seven sibs of one Danish family and characterized by supernumerary nipples (polythelia), preauricular appendages and often binocular epibulbar lipodermoids or unilateral subconjunctival lipodermoids.


Kabuki syndrome

description: Kabuki syndrome (KS) is a multiple congenital anomaly syndrome characterized by typical facial features, skeletal anomalies, mild to moderate intellectual disability and postnatal growth deficiency.


name: epidermolysis bullosa simplex with anodontia/hypodontia


name: Kallmann syndrome-heart disease syndrome

description: Kallmann syndrome with cardiopathy is characterized by hypogonadotropic hypogonadism associated with gonadotropin-releasing hormone (GnRH) deficiency, anosmia or hyposmia (with hypoplasia or aplasia of the olfactory bulbs) and complex congenital cardiac malformations (double-outlet right ventricle, dilated cardiomyopathy, right aortic arch). It represents a distinct clinical entity from Kallmann syndrome.


Kenny-Caffey syndrome

description: A genetic condition characterized by long bone sclerosis and thickening, short stature, and head and eye anomalies. Many affected individuals have hypoparathyroidism with hypocalcemia.


description: Muscular pseudohypertrophy - hypothyroidism, also known as Kocher-Debre-Semelaigne syndrome is a rare disorder characterized by pseudohypertrophy of muscles due to longstanding hypothyroidism.


Kousseff syndrome

description: A syndrome characterized by the association of conotruncal heart defects, myelomeningocele and craniofacial dysmorphism similar to that seen in monosomy 22q11.


bronchogenic cyst

description: Bronchogenic cysts (BCs) are congenital malformations resulting from abnormal budding of the foregut and are most commonly found in the mediastinum.


familial hyperaldosteronism

description: Familial hyperaldosteronism (FH) is the heritable form of primary aldosteronism (PA) which comprises three identified subtypes to date: FH type I (FH-I) characterized by early-onset hypertension, glucocorticoid remediable adrenocorticotropic hormone (ACTH)-dependent hyperaldosteronism, variable hypokalemia, and overproduction of 18-oxocortisol and 18-hydroxycortisol; FH type II (FH-II) characterized by hypertension of varying severity and hyperaldosteronism not suppressible by dexamethasone; and FH type III (FH-III) characterized by profound hypokalemia, early-onset severe hypertension, non glucocorticoid-remediable hyperaldosteronism, and overproduction of 18-oxocortisol and 18-hydroxycortisol.


trisomy 9p

description: Trisomy 9p is a rare chromosomal anomaly syndrome, resulting from a partial or complete trisomy of the short arm of chromosome 9, with a wide phenotypic variablility, typically characterized by intellectual disability, craniofacial dysmorphism (e.g. microcephaly, large anterior fontanel, hypertelorism, strabismus, downslanting palpebral fissures, malformed, low-set, protruding ears, bulbous nose, macrostomia, down-turned corners of mouth, micrognathia), digital anomalies (brachydactyly and clinodactyly), and short stature. Less frequently patients present with cardiopathy and renal, skeletal, and central nervous system malformations.


name: glycogen storage disease due to lactate dehydrogenase deficiency


limb body wall complex

description: Limb body wall complex (LBWC) is characterized by severe multiple congenital anomalies in the fetus with exencephaly/encephalocele, thoraco- and/or abdominoschisis (anterior body wall defects) and limb defects, with or without facial clefts.


duplication of urethra

description: Duplication of the urethra is a rare congenital genitourinary anomaly, encompassing a wide spectrum of anatomic variants in which the urethra is partially or totally duplicated, which may be asymptomatic or cause symptoms such as incontinence, recurrent urinary infections and difficulty urinating.


laryngocele

description: A rare congenital malformation in the larynx. It is characterized by the presence of an air-filled sac within the laryngeal wall which may bulge on the neck.


Lennox-Gastaut syndrome

description: Lennox-Gastaut syndrome (LGS) belongs to the group of severe childhood epileptic encephalopathies.


hypohidrotic ectodermal dysplasia

description: A genetic disorder of ectoderm development characterized by malformation of ectodermal structures such as skin, hair, teeth and sweat glands. It comprises three clinically almost indistinguishable subtypes with impaired sweating as the key symptom: Christ-Siemens-Touraine (CST) syndrome (X-linked), autosomal recessive (AR), and autosomal dominant (AD) HED, as well as a fourth rare subtype with immunodeficiency as the key symptom (HED with immunodeficiency).


lymphoproliferative syndrome

description: A disorder characterized by proliferation of lymphocytes at various stages of differentiation. Lymphoproliferative disorders can be neoplastic (clonal, as in lymphomas and leukemias) or reactive (polyclonal, as in infectious mononucleosis).


atypical hypotonia-cystinuria syndrome

description: A form of hypotonia-cystinuria syndrome characterized by mild to moderate intellectual disability in addition to classic hypotonia-cystinuria syndrome phenotype (cystinuria type 1, generalized hypotonia, poor feeding, growth retardation, and minor facial dysmorphism).


acquired secondary polycythemia

description: An instance of secondary polycythemia that is acquired during the lifetime of the individual.


name: immune dysregulation-inflammatory bowel disease-arthritis-recurrent infections syndrome

description: Immune dysregulation-inflammatory bowel disease-arthritis-recurrent infections syndrome is a rare immune dysregulation disease with immunodeficiency characterized by severe, progressive infantile onset inflammatory bowel disease with pancolitis, perianal disease (ulceration, fistulae), recurrent respiratory, genitourinary and cutaneous infections, arthritis and a high risk of B-cell lymphoma.


name: hyperphenylalaninemia due to tetrahydrobiopterin deficiency

description: Hyperphenylalaninemia (HPA) due to tetrahydrobiopterin (BH4) deficiency, also known as malignant HPA is an amino acid disorder with neonatal onset that is clinically characterized by the classic manifestations of phenylketonuria (PKA) and that later on is clinically differentiated by neurologic symptoms such as microcephaly, intellectual disability, central hypotonia, delayed motor development, peripheral spasticity and seizures, that develop and persist despite an established metabolic control of plasma phenylalanine.


IgG4-related mesenteritis

description: Sclerosing mesenteritis (SM) is a rare pathological disease causing inflammation of the adipose tissue of the small bowel mesentery and is commonly associated with abdominal pain, diarrhea, nausea, weight loss, bloating and loss of appetite. The two subforms include mesenteric panniculitis (where inflammation and fatty necrosis are dominant features) and retractile mesenteritis (where fibrosis and retraction dominate).


description: Leukoencephalopathy-palmoplantar keratoderma syndrome is a rare, genetic epidermal disease characterized by early childhood-onset of punctate palmoplantar keratoderma in association with adult-onset leukoencephalopathy manifested by progressive tetrapyramidal syndrome and cognitive deterioration.


primary orthostatic tremor

description: Primary orthostatic tremor (POT), or ``shaky legs syndrome'', is a rare movement disorder characterized by fast, task-specific tremor, affecting the legs and trunk while standing.


name: Beckwith-Wiedemann syndrome due to NSD1 mutation


megacystis-megaureter syndrome

description: Megacystic-megaureter syndrome is an urinary tract malformation characterized by the presence of a massive primary non-obstructive vesicoureteral reflux and a large capacity, smooth, thin walled bladder due to the continual recycling of refluxed urine. Recurrent urinary infections are commonly associated with this condition.


name: congenital primary megaureter, obstructed form


name: congenital primary megaureter, refluxing form


name: congenital primary megaureter, nonrefluxing and unobstructed form


name: isolated congenital hypogonadotropic hypogonadism

description: A congenital hypogonadotropic hypogonadism that is not part of a larger syndrome.


neonatal iodine exposure

description: A rare endocrine disease characterized by the appearance of transient hypothyroidism, usually in preterm newborns, following long or short-term topical iodine exposure. Parenteral exposure from iodinated contrast agents may similarly alter thyroid function in term neonates.


name: transient congenital hypothyroidism due to maternal factor


name: transient congenital hypothyroidism due to neonatal factor


leukonychia totalis

description: Leukonychia totalis is a rare nail anomaly disorder characterized by complete white discoloration of the nails. Patients typically present white, chalky nails as an isolated finding, although other cutaneous or systemic manifestations could also be present.


familial congenital mirror movements

description: Congenital mirror movement disorder is a condition in which intentional movements of one side of the body are mirrored by involuntary movements of the other side. For example, when an affected individual makes a fist with the right hand, the left hand makes a similar movement. The mirror movements in this disorder primarily involve the upper limbs, especially the hands and fingers. This pattern of movements is present from infancy or early childhood and usually persists throughout life, without other associated signs and symptoms. Intelligence and lifespan are not affected.


name: glaucoma secondary to spherophakia/ectopia lentis and megalocornea

description: Glaucoma secondary to spherophakia/ectopia lentis and megalocornea is a rare, genetic, non-syndromic developmental defect of the eye disorder characterized by congenital megalocornea associated with spherophakia and/or ectopia lentis leading to pupillary block and secondary glaucoma. Additional features may include flat irides, iridodonesis, axial myopia, very deep anterior chambers, miotic, oval pupils without well-defined borders, ocular pain and irritability manifesting as conjunctival injection, corneal edema and central scarring, as well as a high arched palate.


1q44 microdeletion syndrome

description: 1q44 microdeletion syndrome is a newly described syndrome associated with facial dysmorphism, developmental delay, in particular of expressive speech, seizures and hypotonia.


name: progressive supranuclear palsy-pure akinesia with gait freezing syndrome

description: PSP-Pure akinesia with gait freezing (PSP-PAGF) is an atypical variant of progressive supranuclear palsy (PSP), a rare late-onset neurodegenerative disease.


name: progressive supranuclear palsy-corticobasal syndrome

description: PSP-corticobasal syndrome (PSP-CBS) is an atypical variant of progressive supranuclear palsy (PSP), a rare late-onset neurodegenerative disease.


name: progressive supranuclear palsy-progressive non-fluent aphasia syndrome

description: PSP-progressive non fluent aphasia (PSP-PNFA) is an atypical variant of progressive supranuclear palsy (PSP), a rare late-onset neurodegenerative disease. Unlike classic PSP (Richardson syndrome) patients present with an isolated speech production problem years before developing other motor features of PSP.


loiasis

description: Loiasis is a form of filariasis (see this term), caused by the parasitic worm Loa loa, endemic to the forest and savannah regions of Central and Western Africa. Loiasis may either be asymptomatic or manifest as a large, transient area of localized, non-erythematous subcutaneous edema (Calabar swellings), adult worm migration through the sub-conjunctiva (''African eye worm'') and pruritus. Generalized itching, hives, muscle pains, arthralgias, fatigue, and adult worms visibly migrating under the surface of the skin may be observed. Severe complications such as encephalopathy have been reported in highly infected individuals receiving ivermectin during mass drug administration programs for the control of onchocerciasis and lymphatic filariasis.


locked-in syndrome

description: Locked-in syndrome (LIS) is a neurological condition characterized by the presence of sustained eye opening, quadriplegia or quadriparesis, anarthria, preserved cognitive functioning and a primary code of communication that uses vertical eye movements or blinking.


Lowe-Kohn-Cohen syndrome

description: Lowe-Kohn-Cohen syndrome is an extremely rare anorectal malformation syndrome characterized by imperforate anus, closed ano-perineal fistula, preauricular skin tag and absent renal abnormalities and pre-axial limb deformities. There have been no further descriptions in the literature since 1983.


primary pulmonary lymphoma

description: Primary pulmonary lymphoma (PPL) is a rare lymphoma of the lung, defined as a clonal lymphoid proliferation affecting one or both lungs (parenchyma and/or bronchi) in a patient with no detectable extrapulmonary involvement at diagnosis or during the subsequent 3 months. PPL comprises low grade/indolent B cell PPL forms, the most frequent form represented by the marginal B-cell lymphoma of mucosa associated lymphoid tissue (MALT lymphoma) and other non-MALT low grade lymphomas; and more rarely high-grade B-cell PPL (including diffuse large B cell lymphoma) and lymphomatoid granulomatosis (LYG).


description: Macrocephaly-short stature-paraplegia syndrome is characterized by macrocephaly and midface hypoplasia, intellectual deficit, short stature, spastic paraplegia and severe central nervous system anomalies (hydrocephalus and Dandy-Walker malformation). It has been described in two unrelated adults.


central bilateral macrogyria

description: Central bilateral macrogyria is a neuronal migration disorder characterized by pseudobulbar palsy, developmental delay, mild mental retardation and epilepsy. It has been described in at least four children.


acute fatty liver of pregnancy

description: Acute fatty liver of pregnancy is a rare but severe complication occurring in the third trimester of pregnancy or in early postpartum period bearing a risk for perinatal and maternal mortality and characterized by jaundice, rise of hepatic injuries and evolving to acute liver failure and encephalopathy.


name: hypo- and hypermelanotic cutaneous macules-retarded growth-intellectual disability syndrome

description: Hypo- and hypermelanotic cutaneous macules-retarded growth-intellectual disability syndrome is a neurocutaneous syndrome characterized by congenital hypomelanotic and hypermelanotic cutaneous macules. It has been described in individuals spanning three generations of an Indian family. Some of the patients also had retarded growth and intellectual deficit.


primary ciliary dyskinesia

description: A rare, genetically heterogeneous, primarily respiratory disorder characterized by chronic upper and lower respiratory tract disease. Approximately half of PCD patients have an organ laterality defect (situs inversus totalis or situs ambiguus/heterotaxy).


split hand-foot malformation

description: Split hand-split foot malformation (SHFM) refers to a spectrum of genetically and clinically heterogenous terminal limb defect characterized by hypoplasia/ absence of central rays of the hands and feet (that can occur in one to all four digits), median clefts of the hands and/ or feet, aplasia and syndactyly, with a wide range of severity ranging from malformed central finger/ toe to a lobster claw-like appearance of the hands and feet. SHFM can be an isolated malformation or can be a feature in various syndromes (ADULT syndrome, EEC syndrome). SHFM usually follows an autosomal dominant pattern of inheritance with incomplete penetrance, but autosomal recessive and rarely X-linked inheritance have also been reported.


name: biliary atresia with splenic malformation syndrome

description: Biliary atresia with splenic malformation syndrome (BASM) designates the association of biliary atresia and splenic abnormalities (mainly polysplenia and less frequently asplenia, double spleen). Cardiac defect, situs inversus and a preduodenal portal vein can also be present. It represents the embryonal or syndromic form of biliary atresia. It affects newborns or infants and is characterized by jaundice, pale stools, dark urine, failure to thrive, hepatomegaly, coagulopathy, anemia and often palpable spleen.


name: congenital pulmonary airway malformation

description: An abnormality in lung development that is characterized by a multicystic mass resulting from an adenomatous overgrowth of the terminal bronchioles with a consequent reduction of pulmonary alveoli. This anomaly is classified into three types by the cyst size.


conotruncal heart malformations

description: Conotruncal heart malformations are a group of congenital cardiac outflow tract anomalies that include such defects as tetralogy of Fallot, pulmonary atresia with ventricular septal defect, double-outlet right ventricle (DORV), double-outlet left ventricle, truncus arteriosus and transposition of the great arteries (TGA), among others. This group of defects is frequently found in patients with 22q11.2 deletion syndrome. A deletion of chromosome 22q11.2 has equally been associated in a subset of patients with various types of isolated non-syndromic conotruncal heart malformations (with the exception of DORV and TGA where this is very uncommon).


name: familial intestinal malrotation-facial anomalies syndrome


mandibuloacral dysplasia

description: Mandibuloacral dysplasia (MAD) is a rare genetic bone disorder characterized by growth delay, postnatal development of craniofacial anomalies including mandibular hypoplasia, progressive acral osteolysis, mottled or patchy pigmentation, skin atrophy, and partial or generalized lipodystrophy.


systemic mastocytosis

description: Systemic mastocytosis (SM) comprises a heterogeneous group of rare acquired and chronic hematological malignancies that are related to an abnormal proliferation of mast cells in tissue, including bone marrow, with or without skin involvement.


name: arrhythmogenic right ventricular cardiomyopathy

description: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a heart muscle disease that consists in progressive dystrophy of primarily the right ventricular myocardium with fibro-fatty replacement and ventricular dilation, and that is clinically characterized by ventricular arrhythmias and a risk of sudden cardiac death.


infantile mercury poisoning

description: Infantile mercury poisoning is a rare intoxication affecting children, most commonly characterized by erythema of the hands, feet and nose, edematous, painful, pink to red, desquamating fingers and toes, bluish, cold and wet extremities, excessive sweating, irritability, photophobia, muscle weakness, diffuse hypotonia, paresthesia, hypertension and tachycardia, due to elemental, organic or inorganic mercury exposure. Additional manifestations include alopecia, loss of appetite, excessive salivation with red and swollen gums, tooth and nail loss, and insomnia.


name: sporadic adult-onset ataxia of unknown etiology

description: Sporadic adult-onset ataxia of unknown etiology describes a group of non-hereditary degenerative ataxias characterized by a slowly progressive cerebellar syndrome (with ataxia of stance and gait, upper limb dysmetria and intention tremor, ataxic speech, and oculomotor abnormalities), presenting in adulthood (at around 50 years of age), that is not due to a known cause. Extracerebellar symptoms (e.g., decreased vibration sense and absent or decreased ankle reflexes), polyneuropathy and mild autonomic dysfunction may also be present. Mild cognitive impairment has also rarely been reported.


acquired ataxia

description: A type of ataxia that is acquired during the lifetime of the individual.


superficial siderosis

description: Superficial siderosis is a rare neurologic disease characterized by progressive sensorineural hearing loss, cerebellar ataxia, pyramidal signs, and neuroimaging findings revealing hemosiderin deposits in the spinal and cranial leptomeninges and subpial layer. The disease progresses slowly and patients may present with mild cognitive impairment, nystagmus, dysmetria, spasticity, dysdiadochokinesia, dysarthria, hyperreflexia, and Babinski signs. Additional features reported include dementia, urinary incontinence, anosmia, ageusia, and anisocoria.


inhalational anthrax

description: A rare acute systemic infection caused by the inhalation of Bacillus anthracis spores (e.g. through infected animal products, bioterrorism) and characterized by an initial stage where patients present with non specific symptoms (fever, cough, chills, fatigue) that is followed by an acute phase during which hemorrhagic mediastinitis occurs that can progress into meningitis, gastrointestinal involvement, and refractory shock, that can be fatal, if left untreated.


name: autosomal recessive secondary polycythemia not associated with VHL gene


acute neonatal citrullinemia type I

description: Acute neonatal citrullinemia type I is a severe form of citrullinemia type 1 characterized biologically by hyperammonemia and clinically by progressive lethargy, poor feeding and vomiting, seizures and possible loss of consciousness, within one to a few days of birth, with variable signs of increased intracranial pressure. The condition can lead to significant neurologic deficits.


adult-onset citrullinemia type I

description: Adult-onset citrullinemia type I is a form of citrullinemia type I characterized clinically by adult onset of symptoms including variable hyperammonemia and less striking neurological findings which may include intense headache, scotomas, migraine-like episodes, ataxia, slurred speech, lethargy and drowsiness. Serious increased intracranial pressure may occur.


citrin deficiency

description: Citrin deficiency is a rare autosomal recessive urea cycle defect characterized clinically by recurring episodes of hyperammonemia and associated neuropsychiatric symptoms in the adult-onset form (citrullinemia type II), and by transient cholestasis and variable hepatic dysfunction in the neonatal form (neonatal intrahepatic cholestasis due to citrin deficiency).


citrullinemia type II

description: Citrullinemia type II is a severe subtype of citrin deficiency characterized clinically by adult onset (20 and 50 years of age), recurrent episodes of hyperammonemia and associated neuropsychiatric symptoms such as nocturnal delirium, confusion, restlessness, disorientation, drowsiness, memory loss, abnormal behavior (aggression, irritability, and hyperactivity), seizures, and coma.


name: dysraphism-cleft lip/palate-limb reduction defects syndrome


perinatal lethal hypophosphatasia

description: A rare, genetic form of hypophosphatasia (HPP) characterized by markedly impaired bone mineralization in utero due to reduced activity of serum alkaline phosphatase (ALP) and causing stillbirth or respiratory failure within days of birth.


odontohypophosphatasia

description: Odontohypophosphatasia (odonto-HPP) is the least severe form of hypophosphatasia characterized by premature exfoliation of primary and/or permanent teeth and/or severe dental caries, in the absence of skeletal system abnormalities.


megalencephaly

description: A congenital abnormality in which the occipitofrontal circumference is greater than two standard deviations above the mean for a given age. It is associated with hydrocephalus; subdural effusion; arachnoid cysts; or is part of a genetic condition (e.g., alexander disease; sotos syndrome).


name: inflammatory myopathy with abundant macrophages

description: Inflammatory myopathy with abundant macrophages is a rare inflammatory myopathy characterized by diffuse destructive infiltration of CD68+ macrophages into the fascia rather than muscle fibers in muscle biopsies, proximal muscle weakness and myalgia with or without scaly dermatomyositis-like or atypical non-dermatomyositis-like skin lesions, elevation of creatine kinase levels and thickening of muscle fascia in muscle MRI.


lipoblastoma

description: A lipoma usually occurring in the extremities of young children (usually boys). It is characterized by lobules of adipose tissue, separated by fibrous septa. The adipose tissue is composed of mature adipocytes and lipoblasts. The lipoblasts may be scarce, depending on the age of the patient.


X-linked cerebellar ataxia

description: X-linked form of cerebellar ataxia.


name: APC-related attenuated familial adenomatous polyposis


name: autosomal recessive ataxia due to PEX10 deficiency


name: oligoarticular juvenile idiopathic arthritis with anti-nuclear antibodies


name: oligoarticular juvenile idiopathic arthritis without anti-nuclear antibodies


name: rheumatoid factor-negative juvenile idiopathic arthritis with anti-nuclear antibodies


name: rheumatoid factor-negative juvenile idiopathic arthritis without anti-nuclear antibodies


name: autosomal recessive hypohidrotic ectodermal dysplasia

description: A rare autosomal recessive disorder characterized by developmental abnormalities of the skin, sweat glands, hair and nails. Patients have a reduced ability to sweat. Other signs and symptoms include hypotrichosis and teeth malformations.


primary hypertrophic osteoarthropathy

description: A genetically and clinically heterogeneous inherited disorder characterized by digital clubbing and osteoarthropathy, with variable features of pachydermia, delayed closure of the fontanels, and congenital heart disease. There are two types of PHO: pachydermoperiostosis and cranio-osteoarthropathy.


juvenile Huntington disease

description: Juvenile Huntington disease (JHD) is a form of Huntington disease (HD), characterized by onset of signs and symptoms before 20 years of age.


Melhem-Fahl syndrome

description: Melhem-Fahl syndrome was described in two siblings born to consanguineous parents in 1985 and was characterized by the presence of 15 dorsal vertebrae and rib pairs. No other cases have been documented since the initial report.


acquired deficiency anemia

description: An instance of deficiency anemia that is acquired during the lifetime of the individual.


isolated delta-storage pool disease

description: Isolated delta-storage pool disease is a rare, isolated, constitutional thrombocytopenia disorder characterized by defective formation and/or malfunction of platelet dense granules, as well as melanosomes in skin cells, resulting in variable manifestations ranging from mild bleeding and easy bruising to moderate mucous/cutaneous hemorrhagic diathesis and bleeding complications after surgery.


name: lower limb deficiency-hypospadias syndrome

description: Lower limb malformation-hypospadias syndrome is a rare developmental defect during embryogenesis characterized by severe, uni- or bilateral lower limb malformations (incl. tibial hypoplasia, split and rocker bottom-shaped feet, and oligosyndactyly), normal upper limbs and hypospadias. Additional dysmorphic features (e.g. short neck and low-set, large ears), atrial septal defect, ureteropelvic junction stenosis and slight septation of the spleen, have also been reported. There have been no further descriptions in the literature since 1977.


name: limb transversal defect-cardiac anomaly syndrome


meningioma

description: A generally slow growing tumor attached to the dura mater. It is composed of neoplastic meningothelial (arachnoidal) cells. It typically occurs in adults, often women and it has a wide range of histopathological appearances. Of the various subtypes, meningothelial, fibrous and transitional meningiomas are the most common. Most meningiomas are WHO grade I tumors, and some are WHO grade II or III tumors. Most subtypes share a common clinical behavior, although some subtypes are more likely to recur and follow a more aggressive clinical course. (Adapted from WHO)


frontonasal dysplasia

description: A group of rare bone development disorders characterized by an array of abnormalities affecting the eyes, forehead, and nose, and linked to midfacial dysraphia. The clinical picture is highly variable, but the major findings include hypertelorism, a broad nasal root, a large and bifid nasal tip, and widow's peak. Occasionally, abnormalities can include accessory nasal tags, cleft lip, ocular abnormalities (coloboma, cataract, microphthalmia), conductive hearing loss, basal encephalocele and/or agenesis of the corpus callosum. Intellectual deficit is rare and more likely to occur in cases where hypertelorism is severe or where there is extra-cranial involvement.


logopenic progressive aphasia

description: Logopenic progressive aphasia (lv-PPA) is a form of primary progressive aphasia (PPA), characterized by impaired single-word retrieval and naming and impaired repetition with spared single-word comprehension and object knowledge.


name: autosomal dominant optic atrophy and peripheral neuropathy

description: Autosomal dominant optic atrophy and peripheral neuropathy (ADOAPN) is a form of autosomal dominant optic atrophy (ADOA), characterized by progressive and isolated visual loss in the first decade of life, decreased reflexes in the lower limbs and a mild cerebellar stance.


multiple epiphyseal dysplasia

description: Multiple epiphyseal dysplasias (MED/EDMs) are characterized by epiphyseal anomalies causing joint pain early in life, recurrent osteochondritis and early arthrosis. The EDMs are a heterogeneous group of diseases with variable expression classed as MED/EDMs 1-6.


Warburg micro syndrome

description: Micro syndrome is an autosomal recessive disorder caracterised by ocular and neurodevelopmental defects and by microgenitalia. It presents with severe intellectual disability, microcephaly, congenital cataract, microcornea, microphthalmia, agenesis/hypoplasia of the corpus callosum, and hypogenitalism.


name: paternal uniparental disomy of chromosome 1

description: Paternal uniparental disomy of chromosome 1 is an uniparental disomy of paternal origin that most likely does not have any phenotypic expression except from cases of homozygosity for a recessive disease mutation for which only father is a carrier.


name: maternal uniparental disomy of chromosome 1

description: Maternal uniparental disomy of chromosome 1 is an uniparental disomy of maternal origin that most likely does not have any phenotypic expression except from cases of homozygosity for a recessive disease mutation for which only mother is a carrier.


2q31.1 microdeletion syndrome

description: 2q31.1 microdeletion syndrome is a well-defined and clinically recognizable syndrome characterized by moderate to severe developmental delay, short stature, facial dysmorphism and variable limb defects.


2q33.1 microdeletion syndrome

description: 2q33.1 microdeletion syndrome is a rare chromosomal anomaly syndrome, resulting from the partial deletion of the long arm of chromosome 2, with a highly variable phenotype typically characterized by severe intellectual disability, moderate to severe developmental delay (particularly speech), feeding difficulties, failure to thrive, hypotonia, thin, sparse hair, various dental abnormalities and cleft/high-arched palate. Typical dysmorphic features include high, prominent forehead, down-slanting palpebral fissures and prominent nasal bridge with beaked nose. Various behavioral problems (e.g. hyperactivity, chaotic/repetitive behavior, touch avoidance) are also associated.


ring chromosome 5

description: Ring chromosome 5 syndrome is a rare chromosomal anomaly syndrome, with high phenotypic variability, principally characterized by a neonatal mewing cry, severe developmental delay and intellectual disability, short stature, hypotonia, dysmorphic features (incl. microcephaly, facial asymmetry, hypertelorism, epicanthal folds, abnormal ears, micro/retrognathia), congenital cardiac anomalies (such as atrial and ventricular septal defect, tricuspid insufficiency, hypoplastic aorta) and skeletal abnormalities (e.g. hypoplastic thumbs, anomalous ulna/radius, dysplastic metacarpals and phalanges).


6p22 microdeletion syndrome

description: 6p22 microdeletion syndrome is a newly described syndrome associated with a variable clinical phenotype including developmental delay, facial dysmorphism, short neck and diverse malformations.


8p11.2 deletion syndrome

description: 8p11.2 deletion syndrome is a contiguous gene syndrome characterized by the association of congenital spherocytosis, dysmorphic features, growth delay and hypogonadotropic hypogonadism.


8p23.1 microdeletion syndrome

description: 8p23.1 deletion involves a partial deletion of the short arm of chromosome 8 characterized by low birth weight, postnatal growth deficiency, mild intellectual deficit, hyperactivity, craniofacial abnormalities, and congenital heart defects.


8p23.1 duplication syndrome

description: 8p23.1 duplication syndrome is a rare chromosomal anomaly syndrome, resulting from the partial duplication of the short arm of chromosome 8, with a highly variable phenotype, principally characterized by mild to moderate developmental delay, intellectual disability, mild facial dysmorphism (incl. prominent forehead, arched eyebrows, broad nasal bridge, upturned nares, cleft lip and/or palate) and congenital cardiac anomalies (e.g., atrioventricular septal defect). Other reported features include macrocephaly, behavioral abnormalities (e.g., attention deficit disorder), seizures, hypotonia and ocular and digital anomalies (poly/syndactyly).


name: autosomal recessive primary microcephaly

description: Autosomal recessive primary microcephaly (MCPH) is a rare genetically heterogeneous disorder of neurogenic brain development characterized by reduced head circumference at birth with no gross anomalies of brain architecture and variable degrees of intellectual impairment.


name: infantile onset panniculitis with uveitis and systemic granulomatosis


idiopathic recurrent pericarditis

description: A rare autoinflammatory syndrome defined as recurrence of pericardial inflammation of unknown origin following the first episode of acute pericarditis and a symptom-free interval of 4-6 weeks or longer. Recurrent attacks of chest pain may be the sole presentation or the chest pain may be accompanied by pericardial friction rub, electrocardiographic or echocardiographic changes, pericardial effusion and increased C-reactive protein. Cardiac tamponade is a rare, life-threatening complication.


drug-induced vasculitis

description: A skin hypersensitivity reaction due to exposure to a pharmacologic substance that is characterized by raised purpuric lesions, red macules, hemorrhagic blisters and ulcerations.


name: unexplained long-lasting fever/inflammatory syndrome


name: sickle cell-beta-thalassemia disease syndrome

description: Sickle beta thalassemia is an inherited condition that affects hemoglobin, the protein in red blood cells that carries oxygen to different parts of the body.It is a type of sickle cell disease. Affected people have a differentchange (mutation) in each copy of their HBB gene: onethat causes red blood cells to form a 'sickle' or crescent shape and a second that is associated with beta thalassemia, a blood disorder that reduces the production of hemoglobin. Depending on the beta thalassemia mutation, people may have no normal hemoglobin (called sickle beta zero thalassemia) or a reduced amount of normal hemoglobin (called sickle beta plus thalassemia). The presence of sickle-shaped red blood cells, which often breakdown prematurely and can get stuck in blood vessels, combined with the reduction or absence of mature redblood cells leads to the many signs and symptoms of sickle beta thalassemia. Features, which may include anemia (low levels of red blood cells), repeated infections, and frequent episodes of pain, generally develop in early childhood and vary in severity depending on the amount of normal hemoglobin made. Sickle beta thalassemia is inherited in an autosomal recessive manner. Treatment is supportive and depends on the signs and symptoms present in each person.


name: sickle cell-hemoglobin c disease syndrome

description: A rare, genetic hemoglobinopathy characterized by anemia, reticulocytosis and erythrocyte abnormalities including target cells, irreversibly sickled cells and crystal-containing cells. Clinical course is similar to sickle cell disease, but less severe and with less complications. Signs and symptoms may include acute episodes of pain, splenic infarction and splenic sequestration crisis, acute chest syndrome, focal segmental glomerulosclerosis, ischemic brain injury, peripheral retinopathy, and osteonecrosis.


name: sickle cell-hemoglobin d disease syndrome

description: A rare, genetic hemoglobinopathy characterized by all the characteristics of sickle cell anemia (SCA). Clinical course is similar to SCA, including acute episodes of pain, splenic infarction and splenic sequestration crisis, vaso-occlusive crisis, acute chest syndrome, ischemic brain injury, osteomyelitis and avascular bone necrosis. The genotype is characterized by an HbS allele in combination with the HbD variant, beta121Glu>Gln.


name: sickle cell-hemoglobin E disease syndrome

description: A rare, genetic hemoglobinopathy usually characterized by mild microcytic hemolysis and, very rarely, vaso-occlusive complications. Severe manifestations have been reported, including hematuria, splenic infarction, acute chest syndrome, acute episodes of pain and reversible bone marrow necrosis. The genotype is characterized by an HbS allele in combination with an HbE variant (beta26glu>lys); symptoms are due to the low allelic expression of HbE leading to HbS predominance (65+/-5%).


name: hereditary persistence of fetal hemoglobin-sickle cell disease syndrome

description: A rare, genetic, hemoglobinopathy characterized by generally mild clinical phenotype, high fetal hemoglobin levels and mild microcytosis and hypochromia. In some cases, acute sickle cell disease manifestations were reported, namely acute chest syndrome and acute pain crisis. The genotype is characterized by the combination of an HbS and HbF allele; symptoms depend on the degree of HbF:HbS expressivity with patients with more than 35% pancellular HbF expression being asymptomatic. Symptomatic patients have heterocellular expression of HbF.


name: localized junctional epidermolysis bullosa, non-Herlitz type

description: Junctional epidermolysis bullosa, localized non-Herlitz-type is a form of non-Herlitz junctional epidermolysis bullosa (JEB-nH) characterized by localized blistering, and dystrophic or absent nails.


46,XY partial gonadal dysgenesis

description: 46,XY partial gonadal dysgenesis (46,XY PGD) is a disorder of sex development (DSD) associated with anomalies in gonadal development that results in genital ambiguity of variable degree ranging from almost female phenotype to almost male phenotype in a patient carrying a male 46,XY karyotype.


name: recurrent infections-inflammatory syndrome due to zinc metabolism disorder syndrome

description: Hyperzincemia and hypercalprotectinemia is a rare inborn error of zinc metabolism characterized by recurrent infections, hepatosplenomegaly, anemia (unresponsive to iron supplementation) and chronic systemic inflammation in the presence of high plasma concentrations of zinc and calprotectin. Patients typically present dermal ulcers or other cutaneous manifestations (e.g. inflammation) and arthralgia. Severe epistaxis and spontaneous hematomas have also been reported.


toxic or drug-related embryofetopathy

description: Congenital abnormalities caused by medicinal substances or drugs of abuse given to or taken by the mother, or to which she is inadvertently exposed during the manufacture of such substances. The concept excludes abnormalities resulting from exposure to non-medicinal chemicals in the environment.


high grade astrocytic tumor

description: An anaplastic astrocytoma (grade III astrocytic tumor) or glioblastoma (grade IV astrocytic tumor).


gliosarcoma

description: A rare histological variant of glioblastoma (WHO grade IV) characterized by a biphasic tissue pattern with alternating areas displaying glial and mesenchymal differentiation (WHO).


giant cell glioblastoma

description: A rare histological variant of glioblastoma (WHO grade IV) with a predominance of bizarre, multinucleated giant cells, an occasionally abundant stromal reticulin network, and a high frequency of TP53 mutations. (WHO)


gliomatosis cerebri

description: A diffuse glial tumor which infiltrates the brain extensively, involving more than two lobes. It is frequently bilateral and often extends to the infratentorial structures, even to the spinal cord. It is probably of astrocytic origin, although GFAP expression may be scant or absent. (Adapted from WHO.)


anaplastic astrocytoma

description: Anaplastic astrocytoma is a rare, high-grade, malignant glial tumor, histologically characterized by abundance of pleomorphic astrocytes and multiple mitotic figures, often associated with diffuse infiltration of the surrounding tissue, considerable edema and mass effect and involvement of the contralateral brain. Depending on the primary localization of the tumor, patients can present with signs of raised intracranial pressure (headache, vomiting, papilledema), seizures, progressive neurological deficits, and/or behavioral changes. The tumor is most commonly localized in the frontal and temporal lobes, brain stem and spinal cord.


diffuse astrocytoma

description: A low-grade (WHO grade II) astrocytic neoplasm. It is characterized by diffuse infiltration of neighboring central nervous system structures. These lesions typically affect young adults and have a tendency for progression to anaplastic astrocytoma and glioblastoma. Based on the IDH genes mutation status, diffuse astrocytomas are classified as IDH-mutant, IDH-wildtype, and not otherwise specified.


protoplasmic astrocytoma

description: A rare variant of diffuse astrocytoma. It is predominantly composed of neoplastic astrocytes showing a small cell body with few, flaccid processes with a low content of glial filaments and scant GFAP expression. This lesion is not well defined and is considered by some authors as an occasional histopathological feature rather than a reproducibly identifiable variant. When occurring in children, this neoplasm may be difficult to separate from pilocytic juvenile astrocytoma. (Adapted from WHO)


fibrillary astrocytoma

description: The most frequent histological variant of diffuse astrocytoma. It is predominantly composed of fibrillary neoplastic astrocytes. Nuclear atypia is a diagnostic criterion but mitotic activity, necrosis and microvascular proliferation are absent. The occasional or regional occurrence of gemistocytic neoplastic cells is compatible with the diagnosis of fibrillary astrocytoma. (WHO)


gemistocytic astrocytoma

description: A rare variant of diffuse astrocytoma. It is characterized by the presence of a conspicuous, though variable, fraction of gemistocytic neoplastic astrocytes. Gemistocytes are round to oval astrocytes with abundant, glassy, non-fibrillary cytoplasm which appears to displace the dark, angulated nucleus to the periphery of the cell. To make the diagnosis of gemistocytic astrocytoma, gemistocytes should amount to more than approximately 20% of all tumor cells. (Adapted from WHO)


pleomorphic xanthoastrocytoma

description: A WHO grade ll astrocytic tumor with a relatively favorable prognosis. It is characterized by pleomorphic and lipidized cells expressing GFAP often surrounded by a reticulin network and eosinophilic granular bodies. It presents in the superficial cerebral hemispheres and involves the meninges. It typically affects children and young adults.


pilocytic astrocytoma

description: Pilocytic astrocytoma is a rare subtype of low-grade glioma of the central nervous system characterized by a well circumscribed, often cystic, brain tumor with a discrete mural nodule and long, hair-like projections that extend from the neoplastic astrocytes. Depending on the primary localization and the size of the tumor, patients can present with signs of raised intracranial pressure (headache, vomiting, papilledema), blurred vision, decreased visual acuity, ataxia and/or nystagmus, among others. It is most commonly located in the cerebellum, but occurrence in the hypothalamus, brain stem, optic chiasma, and hemispheres has also been reported.


pilomyxoid astrocytoma

description: An astrocytic tumor of uncertain relation to pilocytic astrocytoma. It occurs predominantly in infants and young children. It is characterized by a monomorphic architectural pattern, usually associated with the absence of Rosenthal fibers and eosinophilic granular bodies. The clinical course is usually aggressive.


subependymal giant cell astrocytoma

description: A benign, slowly growing tumor (WHO grade I) typically arising in the wall of the lateral ventricles and composed of large ganglioid astrocytes. It is the most common CNS neoplasm in patients with tuberous sclerosis complex and typically occurs during the first two decades of life. (WHO)


oligodendroglioma

description: A well-differentiated (WHO grade II), diffusely infiltrating neuroglial tumor, typically located in the cerebral hemispheres. It is composed predominantly of cells which morphologically resemble oligodendroglia. The neoplastic cells have rounded homogeneous nuclei and, on paraffin sections, a swollen, clear cytoplasm ('honeycomb' appearance). (Adapted from WHO)


anaplastic oligodendroglioma

description: A WHO grade III oligodendroglioma with focal or diffuse malignant morphologic features (prominent nuclear pleomorphism, mitoses, and increased cellularity).


ependymoma

description: A WHO grade II, slow growing tumor of children and young adults, usually located intraventricularly. It is the most common ependymal neoplasm. It often causes clinical symptoms by blocking cerebrospinal fluid pathways. Key histological features include perivascular pseudorosettes and ependymal rosettes. (WHO)


myxopapillary ependymoma

description: Myxopapillary ependymoma (MEPN) describes a slow growing ependymoma located almost exclusively in the conus medullaris-cauda equina-filum terminale region of the spinal cord, presenting in all age groups, and manifesting with variable symptoms such as neck pain, vomiting and unsteady gait and metastasis. It has a more aggressive disease course and is seen in the pediatric population.


anaplastic ependymoma

description: Anaplastic ependymoma is a rare, malignant type of ependymoma that most often arises in the supratentorial region of the brain of children and young adults and that manifests with variable symptoms including headaches, nausea, vision impairment, memory loss and difficulty walking.


oligoastrocytoma

description: A WHO grade II tumor composed of a conspicuous mixture of two distinct neoplastic cell types morphologically resembling the tumor cells in oligodendroglioma and diffuse astrocytoma. (WHO)


anaplastic oligoastrocytoma

description: An oligoastrocytoma characterized by the presence of increased cellularity, nuclear atypia, pleomorphism, and high mitotic activity.


angiocentric glioma

description: Angiocentric glioma (AG) is an extremely rare slow-growing glial neoplasm of the central nervous system, usually arising in a superficial location in the cerebrum, affecting all ages and both sexes, and characterized by intractable seizures and headaches, with most cases being cured by surgical incision alone and therefore having a good prognosis.


chordoid glioma of the third ventricle

description: A rare, slow-growing neuroepithelial neoplasm of uncertain origin affecting adults. It is located in the third ventricle. It is characterized by the presence of epithelioid cells which express GFAP, and mucinous stroma which contains lymphoplasmacytic infiltrates.


astroblastoma

description: Astroblastoma is a very rare glial neoplasm of the central nervous system, most often with an intra-axial peripheral supratentorial location in one hemisphere of the frontal or parietal lobes and usually presenting in infants and young adults with symptoms of vomiting, loss of consciousness, epileptic seizures and headaches.


anaplastic/large cell medulloblastoma

description: A medulloblastoma composed of sheets of large cells mixed with cells characterized by marked nuclear pleomorphism and high mitotic activity.


name: medulloblastoma with extensive nodularity

description: Medulloblastoma with extensive nodularity (MBEN) is a histological variant of medulloblastoma, an embryonic malignancy, most often located in the inferior medullary velum and then growing into the fourth ventricle, and presenting in infants and young children with symptoms of increased intracranial pressure such as headache, listlessness, vomiting, diplopia and papilledema. It is often associated with Gorlin syndrome and has a relatively good prognosis.


desmoplastic/nodular medulloblastoma

description: A histological variant of medulloblastoma, an embryonic malignancy, often located in one of the cerebellar hemispheres, occurring most frequently in adults and manifesting with symptoms such as vomiting and headache.


classic medulloblastoma

description: Classic medulloblastoma is a histological variant of medulloblastoma, an embryonic malignancy, having a midline location, occurring most often in children and manifesting with variable symptoms such as headaches, nausea, vomiting and ataxia.


name: central nervous system Ewing sarcoma/peripheral primitive neuroectodermal tumor

description: A rare Ewing sarcoma/peripheral primitive neuroectodermal tumor that affects the central nervous system either as a primary dural neoplasm or by direct extension from adjacent soft tissues or bone.


ependymoblastoma

description: Ependymoblastoma is a rare type of primitive neuroectodermal tumor (PNET) that usually occurs in young children under the age of 2 and is histologically distinguished by the production of ependymoblastic rosettes. It is associated with an aggressive course and a poor prognosis.


choroid plexus neoplasm

description: An intraventricular papillary neoplasm that originates from the choroid plexus epithelium. It includes the choroid plexus papilloma, atypical choroid plexus papilloma, and choroid plexus carcinoma.


choroid plexus carcinoma

description: A malignant neoplasm arising from the choroid plexus. It shows anaplastic features and usually invades neighboring brain structures. Cerebrospinal fluid metastases are frequent. (Adapted from WHO)


name: microcephaly-seizures-intellectual disability-heart disease syndrome

description: Microcephaly-seizures-intellectual disability-heart disease syndrome is characterized by intellectual deficit, a cardiac anomaly, micropenis, hypothyroidism, epileptic seizures, and skeletal anomalies. It has been described in two males.


pineoblastoma

description: Pineoblastoma is a rare, malignant type of supratentorial primitive neuroectodermal tumor (sPNET), found mainly in children (less than 10% of cases are reported in adults), and located in the pineal region of the brain but that can metastasize along the neuroaxis. As it is the most aggressive of the pineal parenchymal tumors, it is usually associated with a poor prognosis.


pineocytoma

description: Pineocytoma is the least aggressive form of pineal parenchymal tumors, manifesting with symptoms such as Parinaud's syndrome (a group of eye movement abnormalities and pupil dysfunction, including deficiency in upward-gaze and convergence-retraction nystagmus), headaches, balance impairment, urinary incontinence, and changes in mood and that are not known to disseminate in a diffuse manner. They are usually associated with a good prognosis.


papillary tumor of the pineal region

description: Papillary tumor of the pineal region (PTPR) is a very rare neoplasm of the pineal region that is thought to arise from the specialized ependymocytes of the subcommissural organ and that manifests with visual disturbances, headaches, loss of coordination and balance, nausea and vomiting due to obstructive hydrocephalus.


extraventricular neurocytoma

description: Extraventricular neurocytoma (EVN), a variant of central neurocytoma, is a rare neuronal neoplasm, composed of round cells with neuronal differentiation, which is located outside of the ventricular system, usually within the spinal cord or cerebral hemispheres and that manifests with headache, nausea, vomiting, complex partial seizures or focal neurological deficits. In some cases it may exhibit atypical features consistent with aggressive clinical behavior.


mixed neuronal-glial tumor

description: A group of central nervous system neoplasms with a variable amount of neuronal and, less consistently, glial differentiation. They occur at a low frequency and usually carry a favorable prognosis. Representative examples include dysplastic cerebellar gangliocytoma, desmoplastic infantile ganglioglioma, desmoplastic infantile astrocytoma, and dysembryoplastic neuroepithelial tumor. (Adapted from WHO)


gangliocytoma

description: A well differentiated, slow growing neuroepithelial neoplasm composed of neoplastic, mature ganglion cells.


description: Desmoplastic infantile astrocytoma/ganglioglioma are mixed neuronal-glial tumors representing a histological spectrum of the same tumor. They are usually supratentorially located, large, cystic masses with a peripheral solid component, characterized by prominent desmoplastic stroma and pleomorphic populations of neoplastic cells with either astrocytic or ganglionic differentiation and poorly differentiated cells in variable proportions. They usually present in the first 18 months of age with rapid head growth, bulging anterior fontanel and bone structures over the tumor, signs of raised intracranial pressure (headache, vomiting, papilledema), focal neurological signs and sometimes seizures.


ganglioglioma

description: A well differentiated, slow growing neuroepithelial neoplasm composed of neoplastic, mature ganglion cells and neoplastic glial cells. Some gangliogliomas show anaplastic features in their glial component and are considered to be WHO grade III. Rare cases of newly diagnosed gangliogliomas with grade IV (glioblastoma) changes in the glial component have also been reported. (Adapted from WHO)


anaplastic ganglioglioma

description: A WHO grade III neuroepithelial neoplasm composed of neoplastic, mature ganglion cells and anaplastic glial cells. The anaplastic changes in the glial component and high MIB-1 and TP53 labeling indices may indicate aggressive behavior. However, the correlation of histological anaplasia with clinical outcome is inconsistent. (Adapted from WHO)


papillary glioneuronal tumor

description: A WHO grade I, indolent and relatively circumscribed brain tumor. Morphologically it is characterized by the presence of astrocytes that line vascular and hyalinized pseudopapillae. In between the pseudopapillae aggregates of neurocytes, large neurons, and ganglioid cells are present.


name: rosette-forming glioneuronal tumor of fourth ventricule

description: A central nervous system neoplasm mostly occurring in the fourth ventricle region. It is characterized by the presence of neurocytes forming pseudorosettes and astrocytes which contain Rosenthal fibers. Cytologic atypia is minimal.


name: yolk sac tumor of central nervous system

description: A malignant germ cell tumor of the central nervous system composed of primitive-appearing epithelial cells - putatively representing yolk sac endoderm - set in a loose, variably cellular, and often conspicuously myxoid matrix, resembling extra-embryonic mesoblast. Eosinophilic hyaline globules immunoreactive for AFP are a diagnostic feature. (WHO)


name: choriocarcinoma of the central nervous system

description: A malignant germ cell tumor of the central nervous system characterized by extra-embryonic differentiation along trophoblastic lines. The diagnosis requires the identification of cytotrophoblastic elements, as well as syncytiotrophoblastic giant cells. (WHO)


name: mixed germ cell tumor of central nervous system

description: A malignant germ cell tumor of the central nervous system characterized by the presence of at least two types of germ cell neoplasia.


tumor of meninges

description: A benign or malignant neoplasm that affects the meninges. The majority of the neoplasms arise from meningothelial cells and are called meningiomas. Non-meningothelial cell neoplasms include mesenchymal, non-meningothelial tumors, hemangiopericytomas, and melanocytic lesions.


diffuse leptomeningeal melanocytosis

description: Diffuse leptomeningeal melanocytosis is a rare tumor of meninges arising from leptomeningeal melanocytes, characterized by diffuse infiltration of the leptomeninges (pia mater and arachnoidea) anywhere in the central nervous system. Clinical features may include stillbirth, intracranial hypertension and hydrocephalus, seizure, ataxia, syringomyelia, cranial nerve palsy, intracranial hemorrhage, sphincter dysfunction and neuropsychiatric symptoms. Transformation into malignant melanoma of the central nervous system was reported. It may be associated with congenital nevi, as a part of neurocutaneous melanosis.


meningeal melanocytoma

description: A usually well differentiated melanocytic neoplasm arising from the meninges. It is characterized by the presence of epithelioid, fusiform, polyhedral, and spindle melanocytes without evidence of hemorrhage, necrosis, or high mitotic activity. Presenting symptoms include headache, vomiting, and neurological manifestations. Complete excision is usually curative.


name: primary melanoma of the central nervous system

description: A melanoma that affects the central nervous system. It is characterized by pleomorphism, melanin pigmentation, a high mitotic rate, necrosis, and hemorrhage. It is a highly aggressive and radioresistant tumor. The prognosis is usually poor.


hemangioblastoma

description: Hemangioblastoma is a rare, benign, highly vascularized tumor of the central nervous system, most often located in the cerebellum or spinal cord, presenting in adulthood and manifesting with dizziness, nausea, malaise, headache, bladder or bowel dysfunction, numbness, weakness and pain in the upper or lower extremities, and often associated with von Hippel-Lindau disease (VHL). Exceptional cases of hemangioblastoma arising outside of the central nervous system have been reported.


microcephaly-cleft palate syndrome

description: Microcephaly-cleft palate-abnormal retinal pigmentation syndrome is a rare orofacial clefting syndrome characterized by microcephaly, cleft of the secondary palate and other variable abnormalities, including abnormal retinal pigmentation, facial dysmorphism with hypotelorism and maxillary hypoplasia. Goiter, camptodactyly, abnormal dermatoglyphics and mild intellectual disability may also be associated. There have been no further descriptions in the literature since 1983.


malignant perineurioma

description: A very rare malignant tumor with morphologic features similar to those of benign perineurioma of soft tissue along with hypercellularity, nuclear atypia, hyperchromasia, and a high mitotic rate.


neurofibroma

description: An intraneural or extraneural neoplasm arising from nerve tissues and neural sheaths. It is composed of perineurial-like fibroblasts and Schwann cells. It usually presents as a localized cutaneous lesion and less often as a circumscribed peripheral nerve mass. Patients with neurofibromatosis type 1 present with multiple masses. Neurofibromas which arise from major nerves and plexiform neurofibromas are precursor lesions to malignant peripheral nerve sheath tumors.


malignant triton tumor

description: Malignant triton tumor (MTT) is a rare aggressive subtype of malignant peripheral nerve sheath tumor (MPNST) characterized histopathologically by focal rhabdomyoblastic differentiation.


description: Microcephaly-brain defect-spasticity-hypernatremia syndrome is a rare congenital genetic syndrome with a central nervous system malformation as a major feature characterized by microcephaly, hypertonia, developmental delay and cognitive impairment, swallowing difficulty, hypernatremia, and hypoplasia of the frontal parts and fusion of the lateral ventricles on brain MRI. Only one familial case with three affected siblings reported and there have been no further descriptions in the literature since 1986.


pontocerebellar hypoplasia type 2

description: Pontocerebellar hypoplasia type 2 (PCH2) is the most common subtype of pontocerebellar hypoplasia characterized by neonatal onset and a lack of voluntary motor development and later progressive microencephaly, generalized clonus, development of chorea and spasticity. The majority of patients will not reach puberty.


name: microcephaly-microcornea syndrome, Seemanova type

description: Microcephaly-microcornea syndrome, Seemanova type is characterized by microcephaly and brachycephaly, eye anomalies (microphthalmia, microcornea, congenital cataract), hypogenitalism, severe intellectual deficit, growth retardation and progressive spasticity. It has been described in two patients (a male and his sister's son). Both patients also presented with facial dysmorphism, including upslanting palpebral fissures, epicanthal folds, highly arched palate, microstomia, and retrognathia. This syndrome is transmitted as an X-linked trait.


spondyloepiphyseal dysplasia

description: An osteochondrodysplasia that results in abnormalities of bone growth in the vertebral column and the epiphysis.


description: Microcornea-corectopia-macular hypoplasia syndrome is characterized by microcornea, which may also be accompanied by corectopia and macular hypoplasia. It has been described in three individuals from two successive generations of one family.


spondylometaphyseal dysplasia

description: Spondylometaphyseal dysplasias are a heterogeneous group of disorders associated with walking and growth disturbances that become evident during the second year of life.


description: Anophthalmia and microphthalmia describe, respectively, the absence of an eye and the presence of a small eye within the orbit.


19p13.12 microdeletion syndrome

description: 19p13.12 microdeletion syndrome is a newly described syndrome characterized by moderate to severe developmental delay, language delay, bilateral sensorineural and/or conductive hearing loss and facial dysmorphism.


linear lichen planus

description: Linear lichen planus (LLP), also referred to as Blaschkoid LP, is a rare type of lichen planus characterized by a linear distribution of lichenoid lesions along the lines of Blaschko, which are embryonic pathways of skin development.


actinic lichen planus

description: Actinic lichen planus (LP) is a rare variant of cutaneous lichen planus characterized by the development of photo-distributed lichenoid lesions.


annular atrophic lichen planus

description: Annular atrophic lichen planus (LP) is a rare variant of cutaneous lichen planus characterized by both annular and atrophic LP features in the same lesion.


annular lichen planus

description: Annular lichen planus (LP) is a rare variant of cutaneous lichen planus characterized by the development of annular lesions.


atrophic lichen planus

description: Atrophic lichen planus (LP) is a rare variant of cutaneous lichen planus characterized by the development of pale papules or plaques with an atrophic center.


lichen planus pigmentosus

description: Lichen planus (LP) pigmentosus is a rare variant of cutaneous lichen planus characterized by the presence of hyperpigmented lichenoid lesions in sun-exposed or flexural areas of the body.