hantavirus pulmonary syndrome

description: An infection caused by Hantaviruses. It manifests with flu-like symptoms but it rapidly progresses to life-threatening respiratory problems.


Rift valley fever

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

description: Rift Valley fever (RVF), caused by the Rift Valley fever virus (RVFV), is an arbovirus characterized by a usually self-limiting febrile illness but that in some cases can also manifest with thrombosis, vision loss, hemorrhages and/or neurological symptoms.


Kyasanur forest disease

description: Kyasanura forest disease (KFD), caused by the KFD virus, is an arbovirus characterized by an initial fever, headache and myalgia that can progress to a hemorrhagic disease and that in some cases is followed by a second phase characterized by neurological manifestations.


Omsk hemorrhagic fever

description: Omsk hemorrhagic fever (OHF), caused by Omsk hemorrhagic fever virus (OHFV), is a zoonotic disease characterized by fever, nausea, myalgia and moderately severe hemorrhagic manifestations as well as in some cases meningitis, pneumonia and nephrosis.


papillary renal cell carcinoma

description: A rare subtype of renal cell carcinoma, arising from the renal tubular epithelium and showing a papillary growth pattern, which typically manifests with hematuria, flank pain, palpable abdominal mass or nonspecific symptoms, such as fatigue, weight loss or fever. Symptoms related to metastatic spread, such as bone pain or persistent cough, are frequently associated since early diagnosis is not common. It is typically multifocal, bilateral, and in most cases sporadic, although different hereditary syndromes, such as Hereditary leiomyoma renal cell carcinoma, Birt-Hogg-DubC) syndrome and Tuberous sclerosis, may predispose to the development of papillary renal cell carcinoma.


chromophobe renal cell carcinoma

description: Chromophobe renal cell carcinoma is a rare subtype of renal cell carcinoma, originating from the intercalating cells of the collecting ducts and macroscopically manifesting as a well-circumscribed, highly lobulated, solid tumor that is usually diagnosed at an early stage. It is frequently asymptomatic, or may present with nonspecific symptoms, such as weight loss, fever or fatigue. The classic presentation observed in renal tumors (hematuria, flank pain and palpable mass) is occasionally observed and usually indicates an advanced stage of the disease. It is most frequently sporadic however, several familial cases, associated with Birt-Hogg DubC) syndrome, have been described.


name: MIT family translocation renal cell carcinoma

description: MiT family translocation renal cell carcinoma (t-RCC) is a rare subtype of renal cell carcinoma with recurrent genetic abnormalities, harboring rearrangements of the TFE3 (Xp11 t-RCC) or TFEB [t(6;11) t-RCC] genes. The t(6;11) t-RCC has distinctive histologic features of biphasic appearance with larger epitheloid and smaller eosinophilic cells. The symptoms are usually non-specific and include hematuria, flank pain, palpable abdominal mass and/or systemic symptoms of anemia, fatigue and fever.


name: renal cell carcinoma associated with neuroblastoma

description: Renal cell carcinoma that develops in patients who are long-term survivors of childhood neuroblastoma.


tubulocystic renal cell carcinoma

description: Tubulocystic renal cell carcinoma is an extremely rare subtype of renal cell carcinoma most frequently characterized by a small, solitary, well-circumscribed, unencapsulated renal tumor composed of multiple small to medium-sized cysts with a white or gray, spongy ("bubble wrap-like") cut surface. Patients are usually asymptomatic or could manifest with abdominal pain, abdominal distension and/or hematuria. Progression, recurrence and metastasis rarely occur although lymph node, bone, pleura and liver mestatsis have been reported.


name: autosomal recessive myogenic arthrogryposis multiplex congenita

description: Autosomal recessive myogenic arthrogryposis multiplex congenita is a rare inherited neuromuscular disease characterized by prenatal presentation (usually in the second trimester) of reduced fetal movements and abnormal positioning resulting in joint abnormalities that may involve both lower and upper extremities and is usually symmetric, severe hypotonia at birth with bilateral club foot, motor development delay, mild facial weakness without opthalmoplegia, absent deep tendon reflexes, normal motor and sensory nerve conduction velocities, no cerebellar or pyramidal involvement, and progressive disease course with loss of ambulation after the first decade of life.


inherited acute myeloid leukemia

description: An instance of acute myeloid leukemia that is caused by an inherited modification of the individual's genome.


name: acute myeloid leukemia with CEBPA somatic mutations

description: Acute myeloid leukemia with CEBPA somatic mutations is a subtype of acute myeloid leukemia with recurrent genetic abnormalities, characterized by clonal proliferation of myeloid blasts harboring somatic mutations of the CEBPA gene in the bone marrow, blood and, rarely, other tissues. It can present with anemia, thrombocytopenia, and other nonspecific symptoms related to ineffective hematopoesis (fatigue, bleeding and bruising, recurrent infections, bone pain) and/or extramedullary site involvement (gingivitis, splenomegaly).


name: familial papillary or follicular thyroid carcinoma

description: A papillary or follicular thyroid gland carcinoma with a genetic component that develops within the same family. Current studies suggest that it is inherited in an autosomal dominant pattern. It is often multifocal and bilateral and usually affects younger patients.


familial nonmedullary thyroid carcinoma

description: Familial nonmedullary thyroid carcinoma (fNMTC) is a rare non-syndromic form of thyroid cancer characterized by occurrence of thyroid carcinoma (TC) as the primary feature in a familial setting.


name: autosomal recessive Mendelian susceptibility to mycobacterial diseases due to complete IFNgammaR2 deficiency

description: Mendelian susceptibily to mycobacterial diseases (MSMD) due to complete interferon gamma receptor 2 (IFN-gammaR2) deficiency is a genetic variant of MSMD characterized by a complete deficiency in IFN-gammaR2, leading to an undetectable response to IFN-gamma, and consequently, to severe and often fatal infections with bacillus Calmette-GuC)rin (BCG) and other environmental mycobacteria (EM).


name: autosomal recessive Mendelian susceptibility to mycobacterial diseases due to partial IFNgammaR1 deficiency

description: A genetic variant of Mendelian susceptibility to mycobacterial diseases characterized by a partial deficiency in IFN-gammaR1, leading to a residual response to IFN-gamma and, consequently, to recurrent, moderately severe infections with bacillus Calmette-Guerin (BCG) and other environmental mycobacteria (EM).


name: autosomal recessive Mendelian susceptibility to mycobacterial diseases due to partial IFNgammaR2 deficiency

description: A genetic variant of Mendelian susceptibility to mycobacterial diseases characterized by a partial deficiency in IFN-gammaR2, leading to a residual response to IFN-gamma and consequently to recurrent, moderately severe infections with bacillus Calmette-Guerin (BCG) and other environmental mycobacteria (EM).


name: autosomal dominant mendelian susceptibility to mycobacterial diseases due to partial IFNgammaR2 deficiency

description: A genetic variant of mendelian susceptibility to mycobacterial diseases characterized by a partial deficiency in IFN-gammaR2, leading to impaired response to IFN-gamma and, consequently, to recurrent, moderately severe infections with bacillus Calmette-Guerin (BCG) and other environmental mycobacteria (EM).


name: steroid dehydrogenase deficiency-dental anomalies syndrome

description: Steroid dehydrogenase deficiency-dental anomalies syndrome is an autosomal recessive liver disease which was associated with numerical dental aberrations in a consanguineous Arabi Saudi family. This association suggests that the same gene is involved in both defects. General hypomineralisation and enamel hypoplasia found in this family is thought to be secondary to malabsorption due to liver disease.


name: X-linked Mendelian susceptibility to mycobacterial diseases

description: A rare group of immunodeficiencies due to specific mutations in the inhibitor of kappa light polypeptide gene enhancer in B-cells, kinase gamma (IKBKG) or the cytochrome b-245, beta polypeptide (CYBB) genes. They are characterized by mycobacterial infections, occurring in males.


amyloidosis cutis dyschromia

description: Amyloidosis cutis dyschromia is a rare primary cutaneous amyloidosis characterized by macular or reticulate hyperpigmentation with symmetrically distributed guttate hypo- and hyperpigmented lesions which progress gradually over the years to involve almost the entire body (with relative sparing of the face, hands, feet and neck). Patients are usually asymptomatic, however mild pruritus may be associated. Amyloid deposition in the papillary dermis is observed on skin biopsy. Systemic amyloidosis is not present and association with generalized morphea, atypical Parkinsonism, spasticity, motor weakness or colon carcinoma is rare.


primary lymphoma of the conjunctiva

description: Primary lymphoma of the conjunctiva is an extremely rare clonal lymphoid proliferation of the ocular surface, with an indolent course. Clinically it presents with treatment-resistant conjunctivitis, ptosis, excessive tear production or as a painless, salmon-pink, ''fleshy'' patch, with a smooth or multinodular surface, on the bulbar conjunctiva. Histologically it is usually B-cell Non-Hodgkin lymphoma (most often extranodal marginal zone B-cell lymphoma, followed by follicular and diffuse large B-cell lymphoma), with conjunctival T-cell Non-Hodgkin lymphoma being very rare.


name: inherited glutathione synthetase deficiency

description: Glutathione synthetase deficiency is characterized by hemolytic anemia, associated with metabolic acidosis and 5-oxoprolinuria in moderate forms, and with progressive neurological symptoms and recurrent bacterial infections in the most severe forms.


dehydrated hereditary stomatocytosis

description: Dehydrated hereditary stomatocytosis (DHS) is a rare hemolytic anemia characterized by a decreased red cell osmotic fragility due to a defect in cation permeability, resulting in red cell dehydration and mild to moderate compensated hemolysis. Pseudohyperkalemia (loss of potassium ions from red cells on storage at room temperature) is sometimes observed.


name: pure or complex hereditary spastic paraplegia


maternally-inherited spastic paraplegia

description: A rare, genetic, complex hereditary spastic paraplegia disorder characterized by adulthood-onset of slowly progressive, bilateral, mainly lower limb spasticity and distal weakness associated with lower limb pain, hyperreflexia, and reduced vibration sense. Axonal neuropathy is frequently observed on electromyography and nerve conduction examination.


name: white matter hypoplasia-corpus callosum agenesis-intellectual disability syndrome

description: White matter hypoplasia-corpus callosum agenesis-intellectual disability syndrome is a very rare neurological condition. The few patients described in the medical literature were characterized by brain anomalies; an unusual face with broad nasal root, wide spaced eyes (hypertelorism) and a very small chin (micrognathia); failure to thrive; severe intellectual disability ;and lack of muscle tone (hypotonia). Exams of the brain showed a poor development (hypoplasia) of the pale part of the brain known as white matter, and an absent or abnormal corpus callosum (nerve fibers joining the two hemispheres of the brain). Only a few cases have being described. The cause is unknown but may be related to a disorder of axonal development. The described cases seem to be inherited in an autosomal recessive or X-linked way. Corpus callosum agenesis is one of the more frequent congenital malformations. It can be either asymptomatic or associated with intellectual disability, epilepsy, or psychiatric syndromes. It can be part of several genetic syndromes, such as Aicardi syndrome, Andermann syndrome and Apert syndrome, trisomies 13, 18 ; or result from metabolic causes; drugs (cocaine); or viral infection (influenza). Many patients with corpus callosum anomalies have other brain anomalies, including white matter hypoplasia. There is no information on specific treatment for this condition.


exstrophy-epispadias complex

description: A spectrum of genitourinary malformations ranging in severity from epispadias (E) and classical bladder exstrophy (CEB) to exstrophy of the cloaca (EC) as the most severe form. Depending on severity, the EEC may involve the urinary system, the musculoskeletal system, the pelvis, the pelvic floor, the abdominal wall, the genitalia and sometimes the spine and the anus.


name: deafness-genital anomalies-metacarpal and metatarsal synostosis syndrome

description: Deafness-genital anomalies-metacarpal and metatarsal synostosis syndrome is characterized by sensorineural deafness, bilateral synostosis of the 4th and 5th metacarpals and metatarsals, genital anomalies (hypospadias in males), psychomotor delay and abnormal dermatoglyphics. So far, it has been described in two unrelated patients. Facial dysmorphism was noted in both patients (prominent forehead, ear anomalies, facial asymmetry and an open mouth appearance).


name: hearing loss-familial salivary gland insensitivity to aldosterone syndrome

description: Hearing loss-familial salivary gland insensitivity to aldosterone syndrome is characterized by bilateral moderate-to-severe sensorineural hearing loss and salivary gland insensitivity to aldosterone resulting in hyponatremia. It has been described in two brothers. Transmission appeared to be autosomal recessive.


multiple synostoses syndrome

description: Multiple synostoses syndrome (MSS) is a rare developmental bone disorder characterized by proximal symphalangism of the fingers and/or toes often associated with fusion of carpal and tarsal, humeroradial, and cervical spine joints.


name: central nervous system calcification-deafness-tubular acidosis-anemia syndrome

description: This syndrome is characterized by progressive calcification of the brain and spinal cord, growth retardation, psychomotor anomalies, deafness and anemia. Renal tubular acidosis was found in one patient. To date, this syndrome has been described in only two patients from one family.


description: T-cell immunodeficiency with epidermodysplasia verruciformis is a rare primary immunodeficiency characterized by increased susceptibility to infection by human papillomavirus, presenting in childhood with disseminated flat wart-like cutaneous lesions. Burkitt lymphoma has also been reported. Whilst total T-cell counts are normal, there is impaired TCR signaling, profound peripheral naive T-cell lymphopenia with memory T-cells displaying an exhaustion phenotype.


name: multiple paragangliomas associated with polycythemia


name: severe lateral tibial bowing with short stature

description: Severe lateral tibial bowing with short stature is a rare, genetic, primary bent bone dysplasia characterized by significant, uni-/bilateral, lateral tibial bowing localized to the distal two-thirds of the tibia, with respective cortical thickening and thinning of the inner and outer tibial curve, loss of normal trabecular bone, bilateral abnormalities of the tibial epiphyses and growth plates, as well as foot abnormalities, including abnormally high arches. Affected individuals have short stature with absence of other skeletal abnormalities.


9p13 microdeletion syndrome

description: 9p13 microdeletion syndrome is a rare chromosomal anomaly syndrome, resulting from a partial interstitial deletion of the short arm of chromosome 9, characterized by mild to moderate developmental delay, hand tremors, myoclonic jerks, attention deficit-hyperactivity disorder and a social personality. Patients also present bruxism, short stature and minor facial dysmorphic features (e.g., bilateral epicantic folds, broad, flat nasal bridge, anteverted nares, low-set ears micro/retro-gnathia).


congenital achiasma

description: Congenital achiasma is a rare, genetic, non-syndromic cranial nerve and nuclear aplasia malformation characterized by the congenital absence of the optic chiasm, resulting from the failure of the optic nerve fibers to cross over and decussate to the contralateral hemisphere, leading to decreased vision, strabismus and congenital nystagmus in infancy.


name: mixed sclerosing bone dystrophy with extra-skeletal manifestations


name: hereditary inclusion body myopathy type 4

description: Hereditary inclusion body myopathy type 4 is a rare non-dystrophic myopathy characterized by slowly progressive muscular weakness and atrophy initially involving proximal lower limbs and hip girdle and later on shoulder girdle, proximal upper limbs and axial muscles. Ambulation is usually preserved. Congophilic inclusions with cytoplasmic inclusions of 15-21 nm filaments on electron microscopy are revealed in muscle biopsy.


name: hypertrophic cardiomyopathy and renal tubular disease due to mitochondrial DNA mutation

description: Hypertrophic cardiomyopathy and renal tubular disease due to mitochondrial DNA mutation is a mitochondrial oxidative phosphorylation disorder characterized by hypertrophic and dilated cardiomyopathy, failure to thrive, myopathy with generalized hypotonia and increased creatine kinase, developmental delay and/or regression with cerebral atrophy on brain MRI, renal manifestations including chronic renal failure, renal tubular acidosis and lactic acidosis. Additional clinical features include seizures and respiratory failure.


name: aphonia-deafness-retinal dystrophy-bifid halluces-intellectual disability syndrome

description: Aphonia-deafness-retinal dystrophy-bifid halluces-intellectual disability syndrome is a rare, genetic, multiple congenital anomalies/dysmorphic syndrome characterized by moderate to severe intellectual disability, congenital aphonia, hearing loss, optic atrophy, retinal dystrophy, broad thumbs and duplicated halluces. Facial dysmorphism (incl. thick eyebrows, ptosis, long, downslanting palpebral fissures, microstomia, low-set, posteriorly rotated ears) and genital abnormalities are also associated.


hyperinsulinism due to HNF1A deficiency

description: Hyperinsulinism due to HNF1A deficiency is a form of diazoxide-sensitive diffuse hyperinsulinism (DHI), characterized by transient or persistent hyperinsulinemic hypoglycemia (HH) in infancy that is responsive to diazoxide, evolving in to maturity-onset diabetes of the young subtype 1 (MODY-1) later in life.


benign Samaritan congenital myopathy

description: Benign Samaritan congenital myopathy is a rare, genetic, skeletal muscle disease characterized by severe neonatal hypotonia with respiratory insufficiency, delay in motor milestones, and dysmorphic features including bitemporal narrowing, epicanthal folds and hypertelorism. Affected individuals show gradual improvement in hypotonia and muscle weakness within the first two years of life resulting in minimal clinical manifestations in adulthood.


name: autosomal dominant intermediate Charcot-Marie-Tooth disease with neuropathic pain


name: autosomal dominant Charcot-Marie-Tooth disease type 2 due to KIF5A mutation

description: Autosomal dominant Charcot-Marie-Tooth disease type 2 due to KIF5A mutation is a rare form of axonal peripheral sensorimotor neuropathy characterized by classical CMT2 signs and symptoms (progressive weakness and atrophy of distal limb muscles, mild sensory deficits of position, vibration and pain/temperature, pes cavus, and symmetrically absent or reduced muscle and sensory action potentials with relatively preserved nerve conduction velocities in neurophysiological studies) as well as pyramidal tract involvement (spasticity, hyperreflexia). Spasticity and pain may be the presenting symptoms.


chikungunya

description: An infection that is caused by the Chikungunya virus, which is transmitted by mosquitoes; it is characterized by fever and severe arthralgia.


Hendra virus infection

description: Hendra virus infection is a rare viral infection disorder caused by the Hendra virus characterized by onset of flu-like symptoms (fever, myalgia, headaches, lethargy) approximately one week after having been in close contact with bodily fluids of infected horses. Neurological manifestations (e.g. vertigo, confusion, ataxia) and progressive respiratory failure, leading to death, have also been reported.


invasive non-typhoidal salmonellosis

description: Invasive non-typhoidal salmonellosis (iNTS) is a rare bacterial infectious disease caused by extraintestinal infection of non-typhoidal serotypes of Salmonella enterica in patients with underlying HIV infection, malaria or malignancy. It has a high mortality rate and patients typically present with fever, pallor and respiratory signs (cough, tachnypnea, pneumonia). Gastrointestinal manifestations (diarrhea, vomit, abdominal pain) are not common. Occasionally, organ absseses, septic shock and meningitis may be observed.


ABetaL34V amyloidosis

description: Hereditary cerebral hemorrhage with amyloidosis (HCHWA), Piedmont type is a form of HCHWA characterized by an age of onset between 50-70 years of age, recurrent lobar intracerebral hemorrhages and cognitive decline.


ABeta amyloidosis, Iowa type

description: Hereditary cerebral hemorrhage with amyloidosis (HCHWA), Iowa type is a form of HCHWA characterized by age of onset between 50-66 years of age, memory impairment, myoclonic jerks, expressive dysphagia, short-stepped gait, personality changes and lobar intracerebral hemorrhages.


ABeta amyloidosis, Italian type

description: Hereditary cerebral hemorrhage with amyloidosis (HCHWA), Italian type is a form of HCHWA characterized by an age of onset of 50 years of age, dementia and lobar intracerebral hemorrhage.


ABetaA21G amyloidosis

description: Hereditary cerebral hemorrhage with amyloidosis (HCHWA), Flemish type is a form of HCHWA characterized by an age of onset of 45 years of age, progressive Alzheimer's disease-like dementia and lobar intracerebral hemorrhage in some patients.


ABeta amyloidosis, Arctic type

description: Hereditary cerebral hemorrhage with amyloidosis (HCHWA), Arctic type is a form of HCHWA characterized by an age of onset of 54-61 years and progressive Alzheimer's disease-like dementia, without intracerebral hemorrhages.


hereditary periodic fever syndrome

description: An instance of periodic fever syndrome that is caused by an inherited modification of the individual's genome.


testicular agenesis

description: An abnormality of XY sexual development characterized by the absence of both testes at birth.


description: 46,XY ovotesticular disorder of sex development is a rare, genetic disorder of sex development characterized by either the coexistence of both male and female reproductive gonads or, more frequently, by the presence of one or both gonads containing a mixture of both testicular and ovarian tissue (ovotestes) in an individual with a normal male 46, XY karyotype. External genitalia are usually ambiguous, but can range from normal male to normal female and if a uterus and/or fallopian tubes are present, they are generally hypoplastic. Cryptorchidism, hypospadias, infertility and increased risk of gonadal tumors are frequently associated.


name: classic congenital lipoid adrenal hyperplasia due to STAR deficency


name: non-classic congenital lipoid adrenal hyperplasia due to STAR deficency


name: sex chromosome disorder of sex development

description: Congenital conditions of atypical sexual development associated with abnormal sex chromosome constitutions including monosomy; trisomy; and mosaicism.


autoimmune lymphoproliferative syndrome

description: Autoimmune lymphoproliferative syndrome (ALPS) is a rare, inherited disorder characterized by non-malignant lymphoproliferation, multilineage cytopenias, and a lifelong increased risk of Hodgkin's and non-Hodgkin's lymphoma.


humero-radio-ulnar synostosis

description: Humero-radio-ulnar synostosis is an extremely rare, genetic, congenital joint formation defect disorder characterized by uni- or bilateral fusion of the humerus, radius and ulnar bones, leading to loss of elbow motion and, in most, functional arm incapacity. It may appear as distal humeral bifurcation with absent elbow joint and shortened arm length on imaging. Hand abnormalities, namely oligoectrosyndactyly, may be associated.


congenital radioulnar synostosis

description: Congenital radioulnar synostosis is a rare bone disorder that may be isolated or associated with other disorders and that is characterized by failure of segmentation of the radius and ulna during embryological development, causing limited rotational movements of the forearm, which may lead to difficulties with some activities of daily living.


syringomyelia

description: Syringomyelia is characterized by cerebrospinal fluid (CSF)-filled cavities (syrinx) inside the spinal cord, either as a result of a known cause (secondary syringomyelia, SS) or, more rarely, due to an unknown cause (primary syringomyelia, PS).


multifocal atrial tachycardia

description: Multifocal atrial tachycardia is a rare supraventricular arrhythmia in neonates and young infants that is characterized by multiple P waves with varying P wave morphology and is usually asymptomatic.


His bundle tachycardia

description: His bundle tachycardia is a very rare congenital genetic tachyarrhythmia characterized by incessant tachycardia and high morbidity and mortality.


name: catecholaminergic polymorphic ventricular tachycardia

description: Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a severe genetic arrhythmogenic disorder characterized by adrenergically induced ventricular tachycardia (VT) manifesting as syncope and sudden death.


Takayasu arteritis

description: A rare inflammatory large-vessel vasculitis primarily affecting the aorta and its major branches, but also other large vessels, causing stenosis, occlusion, or aneurysm.


name: autoinflammatory syndrome with pyogenic bacterial infection and amylopectinosis


cerebral sinovenous thrombosis

description: A rare but serious cerebrovascular disorder involving thrombosis of the cerebral venous system. It affects children from the newborn period through childhood and adolescence. In childhood CSVT, acute infections of the head and neck such as mastoiditis are most common, followed by chronic underlying diseases such as nephrotic syndrome, cancer, and inflammatory bowel disease. Signs and symptoms are also age related. Seizures and altered mental status are the commonest manifestations in newborns. Headache, vomiting, and lethargy, sometimes with 6th nerve palsy, are the most common symptoms in children and adolescents.


name: severe early-onset obesity-insulin resistance syndrome due to SH2B1 deficiency


name: spondylocostal dysostosis-hypospadias-intellectual disability syndrome


description: Telecanthus-hypertelorism-strabismus-pes cavus syndrome is characterized by telecanthus, hypertelorism, strabismus, pes cavus and other variable anomalies. It has been described in a father and his son. The son also had hypospadias, bilateral inguinal hernia, clinodactyly and camptodactyly of the fingers, and radiographic findings including flared metaphyses of the long bones and osteopenia.


PLA2G6-associated neurodegeneration

description: Any neurodegeneration with brain iron accumulation in which the cause of the disease is a mutation in the PLA2G6 gene.


name: fatty acid hydroxylase-associated neurodegeneration

description: Fatty acid hydroxylase-associated neurodegeneration (FAHN) is a very rare, autosomal recessive form of neurodegeneration with brain iron accumulation (NBIA) characterized by childhood-onset focal dystonia, progressive spastic paraplegia that progresses to tetra paresis, ataxia, dysarthria, intellectual decline, and oculomotor disturbances (optic atrophy), accompanied by iron deposition in the globus pallidus.


name: hereditary thrombocytosis with transverse limb defect

description: Thrombocythemia with distal limb defects is a rare, genetic syndrome with limb reduction defects characterized by thrombocytosis, unilateral transverse limb defects (ranging from absence of phalanges to absence of hand or forearm) and splenomegaly.


name: adult-onset chronic progressive external ophthalmoplegia with mitochondrial myopathy

description: Adult-onset chronic progressive external ophthalmoplegia with mitochondrial myopathy is a rare mitochondrial disease characterized by adult onset of progressive external ophthalmoplegia, exercise intolerance, muscle weakness, manifestations of spinocerebellar ataxia (e.g. impaired gait, dysarthria) and mild motor peripheral neuropathy. Respiratory insufficiency has been reported in some cases.


name: limbic encephalitis with DPP6 antibodies


name: acute megakaryoblastic leukemia without down syndrome


name: spastic paraplegia-Paget disease of bone syndrome

description: Spastic paraplegia-Paget disease of bone syndrome is an extremely rare, complex form of hereditary spastic paraplegia characterized by a slowly progressive spastic paraplegia (with increased muscle tone, decreased strength in the anterior tibial muscles and hyperreflexia in the lower extremities with Babinski sign) presenting in adulthood, associated with Paget disease of the bone. Cognitive decline, dementia and myopathic changes at muscle biopsy have not been reported.


name: adult-onset distal myopathy due to VCP mutation

description: Adult-onset distal myopathy due to VCP mutation is a rare, genetic distal myopathy disorder characterized by middle age-onset of distal leg muscle weakness, atrophy in the anterior compartment resulting in foot drop, without proximal or scapular skeletal muscle weakness. Rapidly progressive dementia, Paget disease of bone and hand weakness have been reported. Muscle biopsy shows pronounced myopathic changes with rimmed vacuoles.


name: mosaic genome-wide paternal uniparental disomy


description: Non-hypoproteinemic hypertrophic gastropathy is a rare gastroesophageal disease characterized by diffusely enlarged gastric folds, excessive mucus secretion, normal serum protein and gastric TGF-alpha levels. Patients typically present anemia, abdominal pain not related to eating or bowel habits and absence of peripheral edema.


name: juvenile idiopathic inflammatory myopathy


juvenile overlap myositis

description: Juvenile overlap myositis is a rare juvenile idiopathic inflammatory myopathy characterized by the association of inflammatory myositis (manifesting with acral erythema, progressive weakness of the limbs, pain, general fatigue, moodiness or crankiness) with clinical and/or laboratory features of other autoimmune diseases (e.g. systemic lupus erythematosus, localized scleroderma, diabetes). Cardiac involvement has been reported in some patients.


name: transient neonatal multiple acyl-CoA dehydrogenase deficiency

description: Transient neonatal multiple acyl-CoA dehydrogenase deficiency describes a very rare condition where a maternal riboflavin deficiency causes an infant to present with manifestations similar to those seen in multiple acyl-CoA dehydrogenase (MAD) deficiency such as poor suck, metabolic acidosis and hypoglycemia, but that resolves completely with oral riboflavin. In the one patient described haploinsufficiency of the human riboflavin transporter (hRFT1) was described in the mother.


name: classic neuroendocrine tumor of appendix

description: Classic endocrine tumor of the appendix is a type of endocrine tumor of the appendix, seen twice as frequently in females than in males, and usually presenting before the fifth decade of life. Classic endocrine tumor of the appendix is usually asymptomatic when located in the tip of the appendix (without obstruction), but acute appendicitis is often associated.


goblet cell carcinoma

description: An aggressive type of endocrine tumor of the appendix presenting equally in males and females in the fifth decade of life and manifesting with a palpable mass and abdominal pain or acute appendicitis. Metastasis to the ovaries, peritoneum or right colon has usually already occurred in half of patients at the time of diagnosis.


lead poisoning

description: 5 ug/dL) is reported to lead to irreversible effects such as loss of cognition, shortening of attention span, alteration of behavior, dyslexia, attention deficit disorder, hypertension, renal impairment, immunotoxicity and toxicity to the reproductive organs.


mercury poisoning

description: Mercury poisoning is caused mainly through ingestion or inhalation of any of the 3 forms of mercury, elemental, organic, and inorganic. Exposure to elemental mercury affects the pulmonary (inhalation of mercury vapors causes coughing, chills, fever, shortness of breath), dermatological (mild swelling, vesiculation, scaling, irritation, urticaria, erythema and allergic contact dermatitis accompanied by pain), and peripheral and central nervous (CNS) systems (depression, paranoia, extreme irritability, hallucinations, inability to concentrate, memory loss, hands, head, lips, tongue, jaw and eyelids tremors, weight loss, perpetually low body temperature, drowsiness, headaches, insomnia, fatigue). Exposure to inorganic mercury generally causes development of a metallic taste, local oropharyngeal pain, nausea, vomiting, bloody diarrhea, colic abdominal pain, renal dysfunction and, neurologic abnormalities; while that to organic mercury can lead to delayed neurotoxicity.


hydroa vacciniforme

description: A rare skin disorder of unknown etiology affecting children. It is a photodermatitis, characterized by the formation of vesicles and scarring on sun exposed areas.


tetraploidy syndrome

description: The presence of four sets of chromosomes. It is associated with abnormalities, multiple; and miscarrages.


duplication/inversion 15q11

description: Isodicentric chromosome 15 syndrome is a chromosome abnormality that affects many different parts of the body. As the name suggests, people with this condition have an extra chromosome (called an isodicentric chromosome 15) which is made of two pieces of chromosome 15 that are stuck together end-to-end. Although the severity of the condition and the associated features vary from person to person, common signs and symptoms include poor muscle tone in newborns; developmental delay; mild to severe intellectual disability; delayed or absent speech; behavioral abnormalities; and seizures. Most cases of isodicentric chromosome 15 syndrome occur sporadically in people with no family history of the condition. Treatment is based on the signs and symptoms present in each person.


tetrasomy 5p

description: Tetrasomy 5p is a rare chromosomal anomaly syndrome with variable phenotype principally characterized by developmental delay, growth retardation/short stature, hypotonia, seizures, venriculomegaly, hand and foot anomalies (e.g. clinodactyly, overlapping toes) and mosaic pigmentary skin changes. Patients may also present minor dysmorphic craniofacial features (incl. macrocephaly, upslanting palpebral fissures, hypertelorism, abnormal auricles, anteverted nasal tip, midface hypoplasia).


congenital factor XIII deficiency

description: Congenital factor XIII deficiency is an inherited bleeding disorder due to reduced levels and activity of factor XIII (FXIII) and characterized by hemorrhagic diathesis frequently associated with spontaneous abortions and defective wound healing. Factor XIII deficiency is one of the most rare coagulation factor deficiencies.


tetrasomy 9p

description: Tetrasomy 9p is a rare autosomal anomaly characterized by pre- and postnatal growth retardation, psychomotor delay, mild to moderate intellectual disability, hypotonia, microcephaly, dysmorphic features (ocular hypertelorism, low-set, malformed ears, bulbous/beaked nose, microretrognathia, enophthalmos/micropthalmia, epicanthus, strabismus), cleft lip/palate, skeletal abnormalities (hypoplastic nails/distal phalanges, short stature, short neck, contractures), congenital heart defects, renal and urogenital malformations (renal hypoplasia, genital hypoplasia, cryptorchidism).


granulomatous slack skin disease

description: Granulomatous slack skin (GSS) is a variant of mycosis fungoides (MF), a form of cutaneous T-cell lymphoma, and is characterized by the presence of circumscribed areas of pendulous lax skin.


thalidomide embryopathy

description: A group of anomalies presented in infants as a result of in utero exposure (between 20-36 days after fertilization) to thalidomide, a sedative used in treatment of a range of conditions, including morning sickness, leprosy and multiple myeloma (see these terms). Thalidomine embryopathy is characterized by phocomelia, amelia, forelimb and hand plate anomalies (absence of humerus and/or forearm, femur and/or lower leg, thumb anomalies). Other anomalies include facial hemangiomas, and damages to ears (anotia, microtia), eyes (microphthalmia, anophthalmos, coloboma, strabismus), internal organs (kidney, heart, and gastrointestinal tract), genitalia, and heart. Infant mortality associated with thalidomide embryopathy is estimated to be as high as 40%. Thalidomide is contraindicated in pregnancy and pregnancy prevention is recommended in women under treatment.


hyper-IgE syndrome

description: A condition that is characterized by elevated serum IgE, dermatitis, and respiratory infections.


selective IgM deficiency

description: Selective IgM deficiency (SIgMD) is a rare immune disorder that has been reported in association with serious infections, such as bacteria in the blood (bacteremia, also known as septicemia). Although SIgMD was first described in two children, the disorder can occur in babies, children, and adults. It is characterized by isolated absence or deficiency of immunoglobulin M (IgM), normal levels of other immunoglobulins, and recurrent infections (especially by Staphylococcus aureus, Streptococcus pneumoniae, Hemophilus influenza). The cause is still unclear. The diagnosis includes isolated deficiency ofIgM in the blood and no other immunodeficiency or secondary cause of low IgM. Patients with SIgMD and recurrent infections are managed like other antibody defects and deficiencies. It is suggested that people with SIgMD have pneumococcal and meningococcal vaccines, people with SIgMD who have recurrent infections should have prophylactic antibiotics and immune globulin replacement.


Thomas syndrome

description: Thomas syndrome is characterized by renal anomalies, cardiac malformations and cleft lip or palate. It has been described in six patients. Transmission was suggested to be autosomal recessive.


idiopathic hypersomnia

description: Idiopathic hypersomnia is a sleep disorder classified in two forms: idiopathic hypersomnia with long sleep time and idiopathic hypersomnia without long sleep time.


Hoyeraal-Hreidarsson syndrome

description: Hoyeraal-Hreidarsson syndrome (HHS) is a very rare X-linked recessive disorder considered to be a severe variant of dyskeratosis congenita characterized by intrauterine growth retardation, microcephaly, cerebellar hypoplasia, progressive combined immune deficiency and aplastic anemia.


heparin-induced thrombocytopenia

description: Heparin-induced thrombocytopenia (HIT) is a drug-induced, immune-mediated prothrombotic disorder associated with thrombocytopenia and venous and/or arterial thrombosis.


tibial aplasia-ectrodactyly syndrome

description: Tibial aplasia-ectrodactyly syndrome is a rare condition characterized by congenital ectrodactylous limb malformations associated with tibial aplasia or hypoplasia.


description: Jessner lymphocytic infiltration of the skin (JLIS) is a chronic benign cutaneous disease characterized by asymptomatic non-scaly erythematous papules or plaques on the face and neck.


trichothiodystrophy

description: Trichothiodystrophy or TTD is a heterogeneous group disorders characterized by short, brittle hair with low-sulphur content (due to an abnormal synthesis of the sulfur containing keratins).


familial atrial fibrillation

description: An autosomal dominant heart condition that causes disruptions in the heart's normal rhythm. This condition is characterized by uncoordinated electrical activity in the heart's upper chambers (the atria), which causes the heartbeat to become fast and irregular.


pediatric hepatocellular carcinoma

description: Pediatric hepatocellular carcinoma (pediatric HCC) is a rare, aggressive, malignant hepatic tumor that develops mainly in children over 10 years of age.


bullous lichen planus

description: Bullous lichen planus is a variant of rare lichen planus characterized by the development of vesico-bullous lesions.


tracheal agenesis

description: Tracheal agenesis (TA) is a rare congenital malformation in which the trachea may be completely absent (agenesis), or partially in place but underdeveloped (atresia). In both cases, proximal-distal communication between the larynx and the alveoli of the lungs is lacking.


meningococcal meningitis

description: An acute bacterial disease caused by Neisseria meningitides that presents usually, but not always, with a rash (non blanching petechial or purpuric rash), progressively developing signs of meningitis (fever, vomiting, headache, photophobia, and neck stiffness) and later leading to confusion, delirium and drowsiness. Neck stiffness and photophobia are often absent in infants and young children who may manifest nonspecific signs such as irritability, inconsolable crying, poor feeding, and a bulging fontanel. Meningococcal meningitis may also present as part of early or late onset sepsis in neonates. The disease is potentially fatal. Surviving patients may develop neurological sequelae that include sensorineural hearing loss, seizures, spasticity, attention deficits and intellectual disability.


congenital fibrinogen deficiency

description: Congenital deficiencies of fibrinogen are coagulation disorders characterized by bleeding symptoms ranging from mild to severe resulting from reduced quantity and/or quality of circulating fibrinogen. Afibrinogenemia (complete absence of fibrinogen) and hypofibrinogenemia (reduced plasma fibrinogen concentration) correspond to quantitative anomalies of fibrinogen while dysfibrinogenemia corresponds to a functional anomaly of fibrinogen. Hypo- and dysfibrinogenemia may be frequently combined (hypodysfibrinogenemia).


description: Trichodermodysplasia-dental alterations syndrome is a rare, genetic ectodermal dysplasia syndrome characterized by sparse, thin, brittle scalp hair, as well as sparse eyebrows, eyelashes, axillary and pubic hair, delayed eruption of deciduous teeth and hypodontia of both dentitions. Mild palmoplantar keratosis, cafC)-au-lait spots on back, mild dystrophy of nails, and tibial deflection of toes are also associated. There have been no further descriptions in the literature since 1986.


nodular non-suppurative panniculitis

description: Nodular non-suppurative panniculitis, known as Weber-Christian disease (WCD), is a rare skin disorder characterized by recurring inflammation in the subcutaneous layer of fat.


trigonocephaly-broad thumbs syndrome

description: Trigonocephaly-broad thumbs syndrome is characterized by neonatal trigonocephaly and multiple anomalies including craniosynostosis, shallow orbits, unusual nose, deviation of the terminal phalanges of fingers 1, 2, and 5, and broad toes with duplication of the terminal phalanx. It has been described in a mother and her son. It is transmitted as an autosomal dominant trait.


isolated trigonocephaly

description: Isolated trigonocephaly is a nonsyndromic form of craniosynostosis characterized by the premature fusion of the metopic suture.


trisomy X

description: Trisomy X is a sex chromosome anomaly with a variable phenotype caused by the presence of an extra X chromosome in females (47,XXX instead of 46,XX).


triploidy

description: Triploidy is a chromosome abnormality that occurs when there is an extra set of chromosomes present in each cell. Most pregnancies affected by triploidy are lost through early miscarriage. However, reports exist of some affected babies living up to five months. Those that survive are often mosaic. The signs and symptoms associated with triploidy vary but may include a variety of birth defects and an unusually small size. This condition does not run in families and is not associated with maternal or paternal age. Treatment is based on the signs and symptoms present in each person.


trisomy 13

description: Trisomy 13 is a chromosomal anomaly caused by the presence of an extra chromosome 13 and is characterized by brain malformations (holoprosencephaly), facial dysmorphism, ocular anomalies, postaxial polydactyly, visceral malformations (cardiopathy) and severe psychomotor retardation.


distal trisomy 17q

description: Distal trisomy 17q is a rare chromosomal anomaly syndrome with variable phenotype principally characterized by intellectual disability, developmental delay, short stature, craniofacial dysmorphism (incl. microcephaly, low posterior hairline, frontal bossing, bitemporal narrowing, low-set and malformed ears, flat nasal bridge, long philtrum, wide mouth with downturned corners, thin upper lip) and a short, webbed neck, as well as skeletal anomalies (e.g. brachyrhizomelia, poly-/syndactyly) and joint hyperlaxity. Cardiac, cerebral, and urogenital anomalies are also frequently associated.


familial multiple fibrofolliculoma

description: Familial multiple fibrofolliculoma is a genodermatosis characterized by the presence of multiple hamartomas of the hair follicle. It has been described in one family so far.


trisomy 18

description: Trisomy 18 is a chromosomal abnormality associated with the presence of an extra chromosome 18 and characterized by growth delay, dolichocephaly, a characteristic facies, limb anomalies and visceral malformations.


persistent truncus arteriosus

description: A rare congenital cardiovascular disorder characterized by the failure of the embryologic structure truncus arteriosus to divide into the aorta and pulmonary trunk. It results in the presence of a single vessel instead of two vessels leading out of the heart. Clinical signs and symptoms include cyanosis that is present at birth, poor growth, dyspnea, tachypnea, arrhythmia, cardiomegaly, and heart failure. If it is not surgically repaired, it leads to death.


neural tube defect

description: A congenital defect characterized by failure of the neural tube to close completely; this results in the presence of openings in the brain or spinal cord. Examples of neural tube defects include encephalocele and spina bifida.


tuberculosis

description: A chronic, recurrent infection caused by the bacterium Mycobacterium tuberculosis. Tuberculosis (TB) may affect almost any tissue or organ of the body with the lungs being the most common site of infection. The clinical stages of TB are primary or initial infection, latent or dormant infection, and recrudescent or adult-type TB. Ninety to 95% of primary TB infections may go unrecognized. Histopathologically, tissue lesions consist of granulomas which usually undergo central caseation necrosis. Local symptoms of TB vary according to the part affected; acute symptoms include hectic fever, sweats, and emaciation; serious complications include granulomatous erosion of pulmonary bronchi associated with hemoptysis. If untreated, progressive TB may be associated with a high degree of mortality. This infection is frequently observed in immunocompromised individuals with AIDS or a history of illicit IV drug use.


tularemia

description: Tularemia is an infection caused by the bacterium Francisella tularensis. It is more common in rodents and rabbits but has been found in other animals including domestic cats, sheep, birds, and hamsters. Humans can become infected in several different ways: by handling infected animals, through tick or deer fly bites, by drinking contaminated water, or by inhaling contaminated dust or aerosols. Person-to-person transmission has not been reported. The type of tularemia and the particular signs and symptoms vary depending on how the bacteria enter the body. However, fever is seen in most cases. Though tularemia can be life-threatening, most infections can be treated with antibiotics.


soft tissue sarcoma

description: A malignant neoplasm arising from muscle tissue, adipose tissue, blood vessels, fibrous tissue, or other supportive tissues excluding the bones.


thymic epithelial neoplasm

description: An epithelial neoplasm that affects the thymus gland. This category includes thymomas and carcinomas.


hemorrhagic fever-renal syndrome

description: Hemorrhagic fever with renal syndrome (HFRS) is a rodent-borne potentially severe hemorrhagic disease caused by Old World Hantaviruses characterized by high fever, malaise, headache, myalgia, arthralgia, backache, abdominal pain, oliguria/renal failure and systemic hemorrhagic manifestations.


aorto-ventricular tunnel

description: Aorto-ventricular tunnel is a congenital, extracardiac channel which connects the ascending aorta above the sinotubular junction to the cavity of the left, or (less commonly) right ventricle.


transient tyrosinemia of the newborn

description: A benign disorder of tyrosine metabolism detected upon newborn screening and often observed in premature infants. It shows no clinical symptoms. It is characterized by tyrosinemia, moderate hyperphenylalaninemia, and tyrosiluria that usually resolve after 2 months of age.


Uhl anomaly

description: Uhl anomaly is characterized by an almost complete absence of the myocardium in the right ventricle resulting in a thin walled nonfunctional right ventricle manifesting with cardiac arrhythmias and right ventricular failure. Cases of partial absence of right ventricular myocardium which remains asymptomatic or mildly symptomatic until adulthood have also been reported. Patients presenting with complete Uhl anomaly should be considered for cardiac transplantation.


name: umbilical cord ulceration-intestinal atresia syndrome

description: Umbilical cord ulceration-intestinal atresia syndrome is characterized by congenital intestinal atresia, umbilical cord ulceration and severe intrauterine hemorrhage.


ulerythema ophryogenesis

description: Ulerythema ophryogenesis is characterized by inflammatory keratotic papules occurring on the face, which may be followed by scars, atrophy and alopecia. Prevalence is unknown but the disease, affecting mainly children and young adults, is rare. Erythema with mild hyperkeratosis of the hair follicles resulting in rough papules is observed on the cheeks and lateral aspects of the eyebrows. The disorder occasionally extends to the adjacent scalp, ears and forehead and rarely to the extensor surfaces of the limbs. Symptoms regress with age, although loss of the lateral aspects of the eyebrows can occur. Many cases occur sporadically; autosomal dominant inheritance has also been reported. There is no particular treatment, but patients should avoid sun exposure without UV protection.


viral hemorrhagic fever

description: A viral infectious disease caused by RNA viruses in the Arenaviridae, Bunyaviridae, Filoviridae, or Flaviviridae family, and characterized by a severe multisystem syndrome, with damage to the vascular system and hemorrhaging.


familial Mediterranean fever

description: Familial Mediterranean fever (FMF) is an autoinflammatory disorder characterized by recurrent short episodes of fever and serositis resulting in pain in the abdomen, chest, joints and muscles.


double outlet right ventricle

description: Double outlet right ventricle (DORV) is a rare cono-truncal anomaly in which both the aorta and pulmonary artery originate, either entirely or predominantly, from the morphologic right ventricle.


double outlet left ventricle

description: Double-outlet left ventricle (DOLV) is an extremely rare congenital cardiac malformation in which both the aorta and the pulmonary artery arise, either exclusively or predominantly, from the morphologic left ventricle.


description: Microcephaly-brachydactyly-kyphoscoliosis syndrome is characterized by profound intellectual deficit in association with microcephaly, short stature, brachydactyly type D, a flattened occiput, downslanting palpebral fissures, low-set large ears, a broad prominent nose and kyphoscoliosis. It has been described in three sisters. The disorder is likely to be transmitted as an autosomal recessive trait.


Vogt-Koyanagi-Harada disease

description: A bilateral, chronic, diffuse granulomatous panuveitis typically characterized by serous retinal detachment and frequently associated with neurological (meningitis), auditory, and dermatological alterations.


arbovirus fever

description: Arbovirosis are polymorphic diseases caused by arboviruses and are classically characterized by encephalitis and hemorrhage, however, most commonly only aspecific fever is observed.


Waardenburg syndrome

description: A disorder characterized by varying degrees of deafness and minor defects in structures arising from neural crest, including pigmentation anomalies of eyes, hair, and skin. WS is classified into four clinical and genetic phenotypes.


Weaver-Williams syndrome

description: Weaver-Williams syndrome is a multiple congenital anomalies syndrome characterized by moderate-to-severe intellectual disability, decreased muscle mass, microcephaly, facial dysmorphism (prominent ears, midfacial hypoplasia, small mouth and cleft palate), clinodactyly of the fingers, delayed osseous maturation and generalized bone hypoplasia. The syndrome has been described in a brother and sister and an autosomal recessive mode of inheritance has been suggested. There have been no further descriptions in the literature since 1977.


Weill-Marchesani syndrome

description: Weill-Marchesani syndrome (WMS) is a rare condition characterized by short stature, brachydactyly, joint stiffness, and characteristic eye abnormalities including microspherophakia, ectopia of the lens, severe myopia, and glaucoma.


West syndrome

description: West syndrome (or infantile spasms) is characterized by the association of clusters of axial spasms, psychomotor retardation and an hypsarrhythmic interictal EEG pattern. It is the most frequent type of epileptic encephalopathy. It may occur in otherwise healthy infants and in those with abnormal cognitive development.


name: autosomal dominant limb-girdle muscular dystrophy type 1E (DES)

description: Autosomal dominant limb-girdle muscular dystrophy type 1E (LGMD1E) is a subtype of autosomal dominant limb-girdle muscular dystrophy characterized by an adult onset of progressive cardiac conduction defects that begin with cardiac dysrhythmia. Congestive heart failure and symptoms of progressive muscle weakness (present in a proximal distribution) tend to occur later. Affected patients may present only the cardiac features of the disease. Additional features include exertional dyspnea, calf hypertrophy, elevated creatine kinase serum levels and muscle cytoplasmic inclusions.


familial primary hypomagnesemia

description: A hereditary disorder that leads to a selective defect in renal or intestinal magnesium absorption, resulting in a low serum magnesium concentration.


name: familial primary hypomagnesemia with normocalciuria and normocalcemia

description: Familial primary hypomagnesemia with normocalciuria and normocalcemia (FPHNN) is a form of familial primary hypomagnesemia (FPH), characterized by low serum magnesium (Mg) values but inappropriate normal urinary Mg values (i.e. renal hypomagnesemia). The typical symptoms are weakness of the limbs, vertigo, headaches, seizures, brisk tendon reflexes and mild to moderate psychomotor delay.


corneal dystrophy

description: The term corneal dystrophy embraces a heterogeneous group of bilateral genetically determined non-inflammatory corneal diseases that are usually restricted to the cornea. The designation is imprecise but remains in vogue because of its clinical value.


Quinquaud's folliculitis decalvans

description: Folliculitis decalvans is a rare chronic inflammatory cicatricial alopecia of the scalp occurring in middle-aged adults and characterized by the development of alopecic patches with slowly centrifugal spread predominantly in the vertex and occipital area of the scalp, associated with perifollicular erythema, follicular pustules and hemorrhagic crusts.


Wolfram syndrome

description: Wolfram syndrome (WS) also known as DIDMOAD, is a neurodegenerative disorder characterized by type I diabetes mellitus (DM), diabetes insipidus (DI), sensorineural deafness (D), bilateral optical atrophy (OA) and neurological signs. Other related problems are urinary tract atony, ataxia, peripheral neuropathy, psychiatric disorders and/or seizures. 2 types of WS may be distinguished: type 1 and type 2 (WS1 and WS2).


hereditary xanthinuria

description: Hereditary xanthinuria is a purine metabolism disorder due to inherited deficiency of the xanthine dehydrogenase/oxidase enzyme and is characterized by very low (or undetectable) concentrations of uric acid in blood and urine and very high concentration of xanthine in urine, leading to urolithiasis.


name: idiopathic disseminated cytomegalovirus infection


fulminant viral hepatitis

description: Fulminant viral hepatitis is a rapid and severe impairment of liver functions (acute liver failure) with hepatic encephalopathy developing less than 8 weeks after the onset of jaundice, secondary to viral hepatitis mainly due to HBV, but also to HAV.


epidermal nevus syndrome

description: A syndrome characterized by lesions occurring on the face, scalp, or neck which consist of congenital hypoplastic malformations of cutaneous structures and which over time undergo verrucous hyperplasia. Additionally it is associated with neurological symptoms and skeletal, ophthalmological, urogenital, and cardiovascular abnormalities.


galactosemia

description: Galactosemia is a group of rare genetic metabolic disorders characterized by impaired galactose metabolism resulting in a range of variable manifestations encompassing a severe, life-threatening disease (classic galactosemia), a rare mild form (galactokinase deficiency) causing cataract, and a very rare form with variable severity (galactose epimerase deficiency) resembling classic galactosemia in the severe form.


name: disorder of phospholipids, sphingolipids and fatty acids biosynthesis


mitochondrial DNA maintenance syndrome

description: An inherited metabolic disease that is has its basis in the disruption of mitochondrial genome maintenance.


name: digital anomalies-intellectual disability-short stature syndrome


name: intellectual disability-obesity-brain malformations-facial dysmorphism syndrome

description: Intellectual disability-obesity-brain malformations-facial dysmorphism syndrome is a rare, syndromic intellectual disability primarily characterized by moderate to severe intellectual disability, true-to-relative microcephaly and brain abnormalities including a thin corpus callosum, cerebellar hypoplasia, cerebral white matter hypoplasia and multi-focal hyperintensity of cerebral white matter on MRI. Obesity and distinctive craniofacial dysmorphism (including brachycephaly, round face, straight eyebrows, synophrys, hypertelorism, epicanthus, wide and depressed nasal bridge, protruding ears with uplifted lobe, downslanting corners of the mouth) are additional features.


Oncogenic osteomalacia

description: Oncogenic osteomalacia is characterized by the development of a tumor that causes the bones to be weakened. This occurs when a tumor secretes a substance called fibroblast growth factor 23 (FGF23). FGF23 inhibits the ability of the kidneys to absorb phosphate. Phosphate is important for keeping bones strong and healthy. Therefore, this disease is characterized by a softening and weakening of the bones (osteomalacia). The disease also results in multiple biochemical abnormalities including high levels of phosphate in the urine (hyperphosphaturia) and low levels of phosphate in the blood (hypophosphatemia). The majority of tumors that cause oncogenic osteomalacia are small and slow-growing. These tumors most commonly occur in the skin, muscles, or bones of the extremities or in the paranasal sinuses around the head. Most of these tumors are benign, meaning they are not associated with cancer. The exact reason that the tumors associated with oncogenic osteomalacia develop is not known. The disease is diagnosed when a person experiences clinical features such as bone weakening and hyperphosphaturia and a tumor is found by imaging of the body. Treatment of the disease consists of surgical removal of the tumor. The symptoms of the disease, including the weakening of the bones, typically resolve once the tumor is removed.


name: focal epilepsy-intellectual disability-cerebro-cerebellar malformation

description: Focal epilepsy-intellectual disability-cerebro-cerebellar malformation is a rare, genetic neurological disorder characterized by early infantile-onset of seizures, borderline to moderate intellectual disability, cerebellar features including dysarthria and ataxia and cerebellar atrophy and cortical thickening observed on MRI imaging. Seizures are typically focal (with prominent eye blinking, facial and limb jerking), precipitated by fever and often commence with an oral sensory aura (anesthetized tongue sensation). When not properly controlled by anti-epileptic medication, weekly frequency and persistence into adult life is observed.


name: progressive myoclonic epilepsy with dystonia

description: A rare, genetic epilepsy syndrome characterized by neonatal or early infantile onset of severe, progressive, typically frequent and prolonged myoclonic seizures that are refractory to treatment, associated with localized and/or generalized paroxysmal dystonia (which later becomes persistent). Other features include severe hypotonia, hemiplegia, psychomotor regression (or lack of psychomotor development) and progressive cerebral and cerebellar atrophy, with affected individuals becoming progressively non-reactive to environmental stimuli.


16q24.1 microdeletion syndrome

description: 16q24.1 microdeletion syndrome is a partial autosomal monosomy characterized clinically by lethal pulmonary disease that presents as severe respiratory distress and refractory pulmonary hypertension within a few hours after birth and typically results in death from respiratory failure within the first months of life. Characteristic histological features of lung tissue include paucity of alveolar wall capillaries, alveolar wall thickening, muscular hypertrophy of the pulmonary arteries, and malposition of the small pulmonary veins. Various additional congenital malformations may be associated, mostly gastrointestinal (intestinal malrotation and atresias, anular pancreas), genitourinary (dilatation of urinary tracts, duplicated uterus) and cardiovascular anomalies (hypoplastic left heart and other congenital heart defects).


phalangeal microgeodic syndrome

description: Phalangeal microgeodic syndrome is a rare primary osteolysis characterized by multiple small osteolytic areas and sclerosis in the phalanges of one or both hands associated with swelling and redness of the phalanges. Condition is benign, self-limited and may be associated with cold exposure.


name: autosomal recessive cerebellar ataxia with late-onset spasticity

description: Autosomal recessive cerebellar ataxia with late-onset spasticity is a rare, genetic neurodegenerative disease characterized by childhood or adolescent-onset of cerebellar ataxia with dysarthria which slowly progresses and associates pyramidal signs, including lower limb spasticity, brisk reflexes, and Babinski and Hoffman signs. Patients typically present cerebellar ataxia with development of increasing asymmetric spasticity in upper and lower limbs, and variable axonal sensory or sensorimotor neuropathy. Additional heterogeneous features, including pes cavus, scoliolis, and abnormalities of the brain (e.g. cerebral atrophy), may also be associated.


name: brain dopamine-serotonin vesicular transport disease

description: An infantile-onset neurometabolic disease characterized by dystonia, parkinsonism, nonambulation, autonomic dysfunction, developmental delay and mood disturbances.


name: neurodevelopmental disorder-craniofacial dysmorphism-cardiac defect-hip dysplasia syndrome due to 9q21 microdeletion


attenuated Chédiak-Higashi syndrome

description: Attenuated Chédiak-Higashi syndrome (CHS) is a very rare and atypical form of CHS, a genetic disorder characterized by partial oculocutaneous albinism (OCA), severe immunodeficiency, mild bleeding, neurological dysfunction and lymphoproliferative disorder.


oculocutaneous albinism type 1

description: Type 1 oculocutaneous albinism (OCA1) describes a group of tyrosine related OCAs that includes OCA1A, OCA1B, type 1 minimal pigment oculocutaneous albinism (OCA1-MP) and type 1 temperature sensitive oculocutaneous albinism (OCA1-TS).


name: minimal pigment oculocutaneous albinism type 1

description: Type 1 minimal pigment oculocutaneous albinism (OCA1-MP) is an extremely rare form of OCA1 with minimal pigment present, characterized by blond hair, variable iris transillumination, visual acuity ranging from 20/80-20/200 and white skin, with or without skin nevi.


name: temperature-sensitive oculocutaneous albinism type 1

description: Type 1 temperature sensitive oculocutaneous albinism (OCA1-TS) is an extremely rare form of OCA1 characterized by the production of temperature sensitive tyrosinase proteins leading to dark hair on the legs, arms and chest (cooler body areas) and white hair on the scalp, axilla and pubic area (warmer body areas).


name: pyruvate carboxylase deficiency, infantile form

description: Infantile pyruvate carboxylase (PC) deficiency (Type A) is a rare, severe form of PC deficiency characterized by infantile-onset, mild to moderate lactic acidemia, and a generally severe course.


name: pyruvate carboxylase deficiency, severe neonatal type

description: Severe neonatal pyruvate carboxylase (PC) deficiency (Type B) is a rare, extremely severe form of PC deficiency characterized by severe, early-onset metabolic acidosis, and a generally fatal outcome in early infancy.


name: pyruvate carboxylase deficiency, benign type

description: Benign pyruvate carboxylase (PC) deficiency (Type C) is a rare, very mild form of PC deficiency characterized by episodic metabolic acidosis and normal or mildly delayed neurological development.


name: congenital retinal arteriovenous communication


name: idiopathic macular telangiectasia type 1

description: A rare, acquired, eye disease characterized by unilateral (rarely bilateral) abnormally dilated and tortuous capillaries around the fovea, associated with multiple arteriolar and venular aneurysms, lipid depositions, and intra-retinal cystoid degeneration. It leads to vision loss due to macular edema with hard exudates.


name: idiopathic macular telangiectasia type 3

description: A rare, acquired, eye disease characterized by progressive visual loss, due to bilateral juxtafoveolar capillary occlusions, capillary telangiectasia, and minimal exudation. It is associated with systemic or cerebral vascular occlusive disease.


vasoproliferative tumor of retina

description: Vasoproliferative tumor of the retina is a rare, benign, retinal vascular disease characterized by solitary or multiple, unilateral or bilateral, intra-retinal tumor(s), usually located in the peripheral infero-temporal quadrant, and often associated with sub- and intraretinal exudates, epiretinal membranes, exudative retinal detachment and cystoid macular edema, as well as, occasionally, retinal and vitreous hemorrhage. Patients may present with visual loss, floaters, and/or photopsia. Association with various conditions, such as retinitis pigmentosa, congenital retinal toxoplasmosis, retinopathy of prematurity, or coloboma, has been reported.


GM1 gangliosidosis

description: A rare lysosomal storage disorder characterized biochemically by deficient beta-galactosidase activity and clinically by a wide range of variable neurovisceral, ophthalmological and dysmorphic features.


Gaucher disease

description: Gaucher disease (GD) is a lysosomal storage disorder encompassing three main forms (types 1, 2 and 3), a fetal form and a variant with cardiac involvement (Gaucher disease - ophthalmoplegia - cardiovascular calcification or Gaucher-like disease).


coenzyme Q10 deficiency

description: A genetically heterogeneous condition, typically inherited in an autosomal recessive fashion, characterized by coenzyme Q10 deficiency.


serpiginous choroiditis

description: Serpiginous choroiditis is a rare inflammatory eye condition that typicallydevelops betweenage 30 and 70 years. Affected individuals have lesions in the eye thatlast from weeks to months and involve scarringof the eye tissue.Recurrence of these lesionsis common in serpiginous choroiditis. Vision loss may occurin one or both eyeswhen the macula is involved. Treatment options involve anti-inflammatory and immune-suppressing medications.


Erdheim-Chester disease

description: Erdheim-Chester disease (ECD), a non-Langerhans form of histiocytosis, is a multisystemic disease characterized by various manifestations such as skeletal involvement with bone pain, exophthalmos, diabetes insipidus, renal impairment and central nervous system (CNS) and/or cardiovascular involvement.


Madelung deformity

description: Madelung disease, or deformity (MD) is a predominantly bilateral wrist anomaly characterized by shortened and bowed radii and long ulnae leading to dorsal dislocation of the distal ulna and limited mobility of the wrist and elbow.


lateral sclerosis

description: Primary lateral sclerosis (PLS) is an idiopathic non-familial motor neuron disease characterized by slowly progressive upper motor neuron dysfunction leading to spasticity, mild weakness in voluntary muscle movement, hyperreflexia, and loss of motor speech production.


mitochondrial DNA depletion syndrome

description: The mitochondrial DNA (mtDNA) depletion syndrome (MDS) is a clinically heterogeneous group of mitochondrial disorders characterized by a reduction of the mtDNA copy number in affected tissues without mutations or rearrangements in the mtDNA. MDS is phenotypically heterogeneous, and can affect a specific organ or a combination of organs, with the main presentations described being either hepatocerebral (i.e. hepatic dysfunction, psychomotor delay), myopathic (i.e. hypotonia, muscle weakness, bulbar weakness), encephalomyopathic (i.e. hypotonia, muscle weakness, psychomotor delay) or neurogastrointestinal (i.e gastrointestinal dysmotility, peripheral neuropathy). Additional phenotypes include fatal infantile lactic acidosis with methylmalonic aciduria, spastic ataxia (early-onset spastic ataxia-neuropathy syndrome), and Alpers syndrome.


name: atypical hemolytic-uremic syndrome with DGKE deficiency


hereditary retinoblastoma

description: An inherited malignant tumor that originates in the nuclear layer of the retina. A predisposition to retinoblastoma has been associated with 13q14 cytogenetic abnormalities. Patients with the inherited form appear to be at increased risk for secondary nonocular malignancies such as osteosarcoma, malignant fibrous histiocytoma, and fibrosarcoma.


name: neurometabolic disorder due to serine deficiency

description: Serine-deficiency syndrome is a very rare infantile-onset potentially treatable neurometabolic disorder characterized clinically by microcephaly, neurodevelopmental disorders and seizures. Three serine-deficiency syndromes have been described: 3-phosphoglycerate dehydrogenase (3-PGDH) deficiency, 3-phosphoserine phosphatase (3-PSP) deficiency, and phosphoserine aminotransferase deficiency.


autosomal recessive cutis laxa type 2A

description: An autosomal recessive cutis laxa type II classic type that has material basis in homozygous or compound heterozygous mutations in the ATP6V0A2 gene on chromosome 12q24.


arterial thoracic outlet syndrome

description: Arterial thoracic outlet syndrome (ATOS) is a form of thoracic outlet syndrome (TOS) that presents as unilateral upper extremity ischemia.


venous thoracic outlet syndrome

description: Venous thoracic outlet syndrome (VTOS) is a form of thoracic outlet syndrome (TOS) that manifests as unilateral (rarely bilateral) arm pain and cyanosis.


oral submucous fibrosis

description: Oral submucous fibrosis (OSMF) is a chronic, progressive disease that alters the fibroelasticity of the oral submucosa, prevalent in India and Southeast Asia but rare elsewhere, and characterized by burning and pain in the oral cavity, loss of gustatory sensation, the presence of blanched fibrous bands and stiffening of the oral mucosa and oro-pharynx (leading to trismus and a progressive reduction in mouth opening) and an increased risk of developing oral squamous cell cancer (3-19%). It is usually associated with the chewing of the areca nut (an ingredient in betel quid) but the exact etiology is unknown and there is currently no effective treatment.


primary essential cutis verticis gyrata

description: Primary essential cutis verticis gyrata is a rare, progressive dermis disorder characterized by thickening of the scalp resulting in redundancy of the skin which gives rise to folds and grooves that give the scalp a cerebriform appearance. Folds cannot be corrected by pressure or traction and typically are symmetric and extend anteroposteriorly from vertex to occiput and/or transversely in occipital region. Additional features may include mild subungual hyperkeratosis and distal onycholysis of the nail plates of the great toes. It is not associated with neurological and ophthalmological changes, nor with secondary causes.


name: primary non-essential cutis verticis gyrata


morning glory syndrome

description: Morning glory syndrome (MGS) is an optic neuropathy characterized by a congenital funnel shaped excavation of the posterior fundus that incorporates the optic disk malformation (resembling the morning glory flower) MGS is usually unilateral and may result in a decrease in best-corrected visual acuity (BCVA). MGS either occurs isolated or associated to other ocular or non-ocular anomalies.


idiopathic nephrotic syndrome

description: Nephrotic syndrome for which no cause has been identified.


malignant germ cell tumor of ovary

description: Malignant germ cell tumor of ovary is a rare ovarian cancer arising from germ cells in the ovary, frequently unilateral at diagnosis which characteristically presents during adolescence with pelvic mass, fever, vaginal bleeding and acute abdomen.


name: malignant sex cord stromal tumor of ovary

description: Malignant sex cord stromal tumor (SCST) of ovary is a rare ovarian cancer arising from granulosa, theca, sertoli and leydig cells or stromal fibroblasts, occurring at any age and presenting with abdominal or pelvic mass, and characterized (with the exception of fibroma) by the production of sex steroids resulting in manifestations of hormone excess, with a relatively favorable prognosis.


acute opioid poisoning

description: Acute opioid poisoning is a rare intoxication with opioids, a large group of alkaloid analgesics, mainly characterized by miosis (pinpoint pupil), respiratory depression (bradypnea/apnea) and central nervous system depression (sedation or coma). Other manifestations include hypotension, reduced bowel motility, hypothermia and hypoglycemia. Naloxone, a competitive inhibitor of the mu-opioid receptor, is a potent antagonist and is used as the antidote for opioid intoxication.


hereditary glaucoma

description: Hereditary glaucoma is a clinically diverse group of rare eye disorders with genetic predisposition characterized by elevated intraocular pressure (IOP) and glaucomatous changes of the optic nerve head, leading to field defects, visual loss and blindness. Hereditary glaucoma can be sub-classified as primary (congenital glaucoma, juvenile glaucoma) or secondary according to the presence or absence of systemic or other ocular anomalies (iridogoniodysgenesis, Stickler syndrome, Coats syndrome). The clinical presentation is variable and is based on age, severity of glaucoma, presence of ocular abnormalities and development of secondary IOP related abnormalities.


name: combined deficiency of factor V and factor VIII

description: Combined deficiency of factor V and factor VIII is an inherited bleeding disorder due to the reduction in activity and antigen levels of both factor V (FV) and factor VIII (FVIII) and characterized by mild-to-moderate bleeding symptoms.


glioblastoma

description: The most malignant astrocytic tumor (WHO grade IV). It is composed of poorly differentiated neoplastic astrocytes and it is characterized by the presence of cellular polymorphism, nuclear atypia, brisk mitotic activity, vascular thrombosis, microvascular proliferation and necrosis. It typically affects adults and is preferentially located in the cerebral hemispheres. It may develop from diffuse astrocytoma WHO grade II or anaplastic astrocytoma (secondary glioblastoma, IDH-mutant), but more frequently, it manifests after a short clinical history de novo, without evidence of a less malignant precursor lesion (primary glioblastoma, IDH- wildtype). (Adapted from WHO)


intestinal lymphangiectasia

description: Dilatation of the intestinal lymphatic system usually caused by an obstruction in the intestinal wall. It may be congenital or acquired and is characterized by diarrhea; hypoproteinemia; peripheral and/or abdominal edema; and protein-losing enteropathies.


staphylococcal scalded skin syndrome

description: A blistering skin disorder caused by exfoliative toxins produced by Staphylococcus aureus infection. The toxins cause the formation of bullae and diffuse skin desquamation. The lesions may be localized or generalized, far away from the initial site of infection.


bullous impetigo

description: Bullous impetigo is a contagious superficial infection occurring in intact skin. Prevalence in the general population is unknown. The disease is characterized by fragile vesicles and flaccid blisters, most often presenting as erosive lesions covered by a yellow crust. The face, trunk and extremities of children under 5 years of age (particularly neonates) are mainly affected. The disease is generally caused by group II Staphylococcus aureus.


staphylococcal necrotizing pneumonia

description: Staphylococcal necrotizing pneumonia is a rare, bacterial, pulmonary infectious disease, caused by a Panton-Valentine leukocidin-producing Staphylococcus aureus strain, characterized by severe respiratory failure, extensive, rapidly progressing pneumonia and hemorrhagic lung necrosis. Patients typically present with influenza-like symptoms, such as fever, cough, and chest pain, as well as hemoptysis, hypotension, leukopenia, and severe respiratory symptoms that rapidly evolve to acute respiratory distress syndrome and septic shock. High mortality is associated.


gastric linitis plastica

description: Gastric linitis plastica (gastric LP) is a malignant, diffuse, infiltrative gastric adenocarcinoma.


name: autosomal recessive cerebellar ataxia - pyramidal signs - nystagmus - oculomotor apraxia syndrome

description: Autosomal recessive cerebellar ataxia-pyramidal signs-nystagmus-oculomotor apraxia syndrome is a rare, genetic, slowly progressive neurodegenerative disease characterized by delayed psychomotor development beginning in infancy, mild to profound intellectual disability, gait and stance ataxia, pyramidal signs (hyperreflexia, extensor plantar responses), dysarthria, and ocular abnormalities (e.g. nystagmus, oculomotor apraxia, abduction deficits, esotropia, ptosis). Brain imaging reveals progressive, generalized cerebellar atrophy, mild ventriculomegaly and, in some, retrocerebellar cysts.


name: autosomal dominant childhood-onset proximal spinal muscular atrophy


testicular teratoma

description: A non-seminomatous germ cell tumor arising from the testis. It is characterized by the presence of various tissues which correspond to the different germinal layers (endoderm, mesoderm, and ectoderm). Testicular teratomas in children follow a benign clinical course whereas in postpubertal patients may metastasize to other anatomic sites.


name: mitochondrial DNA depletion syndrome, hepatocerebrorenal form


name: acute encephalopathy with biphasic seizures and late reduced diffusion

description: Acute encephalopathy with biphasic seizures and late reduced diffusion (AESD) is a rare childhood-onset epilepsy syndrome associated with infection and characterized by a biphasic clinical course. The initial symptom is a prolonged febrile seizure on day 1 (the first phase). Afterwards, patients have variable levels of consciousness from normal to coma. Irrespective of the consciousness levels, magnetic resonance imaging (MRI) during the first 2 days shows no abnormality. During the second phase (usually days 4 - 6), patients show a cluster of seizures and deterioration of consciousness. Diffusion-weighted images (DWI) on MRI reveal the brain lesions with reduced diffusion predominantly in the subcortical white matter. After the second acute phase, consciousness levels improve with the emerging focal neurological signs. Neurological outcomes of AESD vary from normal to mild or severe sequelae including cerebral atrophy, mental retardation, paralysis and epilepsy.


new-onset refractory status epilepticus

description: New-onset refractory status epilepticus is an acute encephalopathy with inflammation-mediated status epilepticus characterized by an acute refractory status epilepticus, typically of the tonic-clonic type, following prodromal symptoms of confusion, fever, fatigue, headache, symptoms of gastrointestinal or upper respiratory tract infection, behavioral changes or hallucinations. Brain MRI abnormalities and abnormal findings in CSF, including pleocytosis and/or elevated protein levels, are frequently found during acute episode. Treatment-resistant epilepsy, cognitive and psychiatric impairments are usual consequences.


extragonadal germ cell tumor

description: A germ cell tumor arising in an anatomic site other than the testis or ovary (e.g., central nervous system, lung, mediastinum, and retroperitoneum).


name: LMNA-related cardiocutaneous progeria syndrome

description: A rare, genetic, premature aging syndrome characterized by adulthood-onset cutaneous manifestations that result in a prematurely aged appearance (i.e. premature thinning and graying of scalp hair, loss of subcutaneous fat, tightening of skin) associated with prominent cardiovascular manifestations, such as accelerated atherosclerosis, calcific valve disease, and cardiomyopathy. Patients present loss of eyebrows and eyelashes in childhood and have a predisposition to develop malignancies.


20q11.2 microduplication syndrome

description: 20q11.2 microduplication syndrome is a rare chromosomal anomaly syndrome, due to partial duplication of the long arm of chromosome 20, characterized by psychomotor and developmental delay, moderate intellectual disability, metopic ridging/trigonocephaly, short hands and/or feet and distinctive facial features (epicanthus, hypoplastic supraorbital ridges, horizontal/downslanting palpebral fissures, small nose with depressed nasal bridge and anteverted nostrils, prominent cheeks, retrognathia and small, thick ears). Growth delay and cryptororchidism are often associated features.


distal monosomy 1q

description: 1qter deletion syndrome is a chromosomal anomaly characterized by an intellectual deficiency, progressive microcephaly, seizures, growth delay, distinct facial dysmorphic features and various midline defects including cardiac, corpus callosum, gastro-oesophalgeal and urogenital anomalies.


name: childhood-onset autosomal recessive myopathy with external ophthalmoplegia


2p13.2 microdeletion syndrome

description: 2p13.2 microdeletion syndrome is a rare partial autosomal monosomy characterized by global development delay, intellectual disability, behavioral abnormalities (hyperactivity, attention deficit and autistic behaviors), brachycephaly and variable facial dysmorphism. Other associated features may include vertebral fusions, mild contractures of knees and elbows, and feeding difficulties during infancy.


name: neurofibromatosis type 1 due to NF1 mutation or intragenic deletion


Alexander disease type I

description: Alexander disease type I (AxD type I) is an astrogliopathy and the most severe and common form of Alexander disease (AxD), presenting before the age of 4 and characterized by seizures, megalencephaly and developmental delay with progressive deterioration.


Alexander disease type II

description: Alexander disease type II (AxD type II) is an astrogliopathy and a form of Alexander disease (AxD) characterized by ataxia, bulbar symptoms, spastic paraparesis, palatal myoclonus, and autonomic symptoms.


Balint syndrome

description: Balint syndrome is a rare neurologic disease characterized by the triad of optic ataxia, ocular apraxia and simultanagnosia due to posterior parietal lobe lesions. Patients report ophthalmologic difficulties in the absence of underlying ophthalomologic anomalies and present severe visual and spatial disabilities in locating and reaching objects, initiating voluntary eye movements and perceiving more than one object at a time.


familial cervical artery dissection

description: An instance of cervical artery dissection that is caused by an inherited modification of the individual's genome.


name: hereditary sensory and autonomic neuropathy type 1

description: Hereditary sensory neuropathy type I (HSN I) is a slowly progressive neurological disorder characterized by prominent predominantly distal sensory loss, autonomic disturbances, autosomal dominant inheritance, and juvenile or adulthood disease onset.


description: A familial epilepsy syndrome in which family members display a seizure disorder from the generalized epilepsy with febrile seizures plus spectrum which ranges from simple febrile seizures (FS) to the more severe phenotype of myoclonic-astatic epilepsy (MAE) or Dravet syndrome (DS).


paraneoplastic neurologic syndrome

description: A paraneoplastic syndrome that involves the nervous system.


name: Koolen-de Vries syndrome due to 17q21.31 microdeletion syndrome


name: Koolen-de Vries syndrome due to a point mutation


immune hydrops fetalis

description: Immune hydrops fetalis (IHF), a form of HF, describes the excessive accumulation of fetal fluid within the fetal extravascular compartments and body cavities due to maternal rhesus (Rh) incompatibility.


name: systemic Epstein-Barr virus-positive T-cell lymphoproliferative disease of childhood

description: Systemic Epstein-Barr virus (EBV)-positive T-cell lymphoproliferative disease of childhood is a rare and very aggressive neoplastic disease emerging after a primary acute or chronic active EBV infection. It presents with persisting fever and malaise, hepatosplenomegaly with or without lymphadenopathy, liver failure, severe pancytopenia and a rapid progression towards multi-organ failure and hemophagocytic syndrome with a fatal issue. It is characterized by clonal proliferation of EBV-infected T cells with an activated cytotoxic phenotype.


hydroa vacciniforme-like lymphoma

description: A rare, EBV-positive cutaneous T-cell lymphoproliferative disorder, composed of CD8 positive cytotoxic T-lymphocytes. It affects children, almost exclusively in Latin America and Asia. Patients present with papulovesicular skin lesions, clinically resembling hydroa vacciniforme, in areas of sun-exposed skin.


ALK-positive large B-cell lymphoma

description: Anaplastic lymphoma kinase (ALK)-positive diffuse large B-cell lymphoma is a very rare variant of diffuse large B-cell lymphoma (DLBCL) mainly affecting middle-aged immunocompetent men and characterized by a consistent primary involvement of lymph nodes (mainly in the cervical and mediastinum lymph nodes) and with infrequent extra nodal involvement of the bone marrow and other extra-nodal sites (head and neck region, liver, spleen, and gastrointestinal tract). It has an aggressive disease course, and is associated with a poor prognosis.


description: Infantile epileptic-dyskinetic encephalopathy is a monogenic disease with epilepsy characterized by developmental delay and infantile spasms in the first months of life, followed by chorea and generalized dystonia and progressing to quadriplegic dyskinesia, recurrent status dystonicus, intractable focal epilepsy and severe intellectual disability.


description: Hypocomplementemic urticarial vasculitis (HUV) is an immune complex-mediated small vessel vasculitis characterized by urticaria and hypocomplementemia (low C1q with or without low C3 and C4), and usually associated with circulating anti-C1q autoantibodies. Arthritis, pulmonary disease, ocular inflammation, and glomerulonephritis are common systemic manifestations.


bipartite talus

description: Bipartite talus is a rare, genetic bone disorder characterized by the presence of two non-fused talar bone fragments, with the posterior fragment located at the level of the posterior talar process. Patients may present with foot and/or ankle pain (exercise-induced or not), repetitive ankle sprains, chronic ankle ligamentous laxity, restricted ankle motion (i.e. plantar flexion, eversion, and inversion), and mild swelling.


Stevens-Johnson syndrome

description: Stevens-Johnson syndrome is a limited form of toxic epidermal necrolysis characterized by destruction and detachment of the skin epithelium and mucous membranes involving less than 10% of the body surface area.


skeletal dysplasia

description: Any Mendelian diseases that affects growth and development of the skeleton.


name: otopalatodigital syndrome spectrum disorder

description: Otopalatodigital syndrome spectrum disorder is a primary bone dysplasia and encompasses a group of congenital anomalies that are characterized by skeletal dysplasia of varying clinical severity and an X linked dominant pattern of inheritance. This group include otopalatodigital syndrome type 1 and 2 (OPD1, OPD2) which are characterized in affected males by cleft palate, conductive hearing loss, craniofacial abnormalities and skeletal dysplasia; Melnick-Needles syndrome (MNS) which displays skeletal deformities in females and embryonic or perinatal lethality in most males; frontometaphyseal dysplasia (FMD); and terminal osseous dysplasia - pigmentary defects.


dysostosis

description: A group of disorders in which the skeletal involvement is predominantly manifested as abnormalities of individual bones or in a group of bones.


autoimmune hypoparathyroidism

description: An autoimmune form of hypoparathyroidism.


name: intellectual disability-hyperkinetic movement-truncal ataxia syndrome


description: 2p21 microdeletion syndrome without cystinuria is a rare partial autosomal monosomy characterized by weak fetal movements, severe infantile hypotonia and feeding difficulties that spontaneously improve with time, urogenital abnormalities (hypospadias or hypoplastic labia majora), global development delay, mild intellectual disability and facial dysmorphism (dolichocephaly, frontal bossing, bilateral ptosis, midface retrusion, open mouth with tented upper lip vermilion). Affected individuals have borderline elevated serum lactate but no cystinuria.


description: Intellectual disability-seizures-macrocephaly-obesity syndrome is a rare syndromic obesity due to complex chromosomal rearrangement characterized by development delay and intellectual disability, childhood-onset obesity, seizures, poor coordination and broad-based gait, macrocephaly and mild dysmorphic features (such as narrow palpebral fissures, malar hypoplasia and thin upper lips), eczema, ocular abnormalities and a social personality.


name: finger hyperphalangy - toe anomalies - severe pectus excavatum syndrome


name: diffuse palmoplantar keratoderma with painful fissures


name: focal palmoplantar keratoderma with joint keratoses


name: intellectual disability-facial dysmorphism-hand anomalies syndrome


name: spondyloepimetaphyseal dysplasia, Isidor type


name: spondylometaphyseal dysplasia, Czarny-Ratajczak type


name: acute myeloid leukemia with t(8;16)(p11;p13) translocation

description: A distinct form of Acute myeloid leukemia (AML) in which this chromosomal anomaly is found de novo or in therapy-related AML cases, and is characterized by frequent extramedullary involvement (mainly hepatomegaly, splenomegaly, lymphadenopathies, cutaneous infiltration, but also gum, bone, central nervous system, testicles involvement), severe coagulation disorder (disseminated intravascular coagulopathy or primary fibrinolysis) and poor prognosis. Morphologically, a blast population with a myelomonocytic stage of differentiation is observed.


familial syringomyelia

description: An instance of syringomyelia that is caused by an inherited modification of the individual's genome.


Nevada syndrome

description: NEVADA (Nevus Epidermicus Verrucosus with AngioDysplasia and Aneurysms) syndrome is a rare, life-threatening, cutaneous disease characterized by a keratinocytic epidermal nevus presenting thick, hystrix-like, white or brownish hyperkeratosis associated with multiple extracutaneous vascular malformations, including angiodysplasia that involves large-vessel arteriovenous shunts that may be fatal during the neonatal period.


fetal carbamazepine syndrome

description: A drug-related embryofetopathy that can occur when an embryo/fetus is exposed to carbamazepine and that is characterized by facial dysmorphism, with some similarities to that seen in fetal valproate syndrome (see this term), such as epicanthal folds, upward slanting palpebral fissures, short nose, micrognathia and malar hypoplasia, as well as nail dysplasia and major anomalies including cleft lip/palate, neural tube defects and cardiac anomalies. In utero exposure to carbamazepine, in combination with valproate, has been associated with significant developmental delay (particularly affecting verbal intelligence) and a high rate of congenital anomalies.


oculocutaneous albinism type 6

description: A form of oculocutaneous albinism characterized by light hair at birth that darkens with age, white skin, transparent irides, photophobia, nystagmus, foveal hypoplasia and reduced visual acuity.


ataxia - telangiectasia variant

description: Ataxia-telangiectasia variant is a rare, genetic, persistent combined dystonia characterized by clinical signs similar to ataxia-telangiectasia but with a later (usually adulthood) onset and slower progression. Patients typically present extrapyramidal signs, such as resting tremor, choreathetosis, and dystonia, as the initial symptoms and later often develop mild cerebellar ataxia (with gait usually preserved). Telangiectasia and immunodeficiency may be absent but secondary features of ataxia-telangiectasia, such as risk of malignancy, dysarthria and peripheral neuropathy, are frequently present.


Medich giant platelet syndrome

description: Medich giant platelet syndrome (MGPS) is a platelet granule disorder characterized by thrombocytopenia with giant platelets resulting in easy bleeding.


white platelet syndrome

description: White platelet syndrome (WPS) is is a platelet granule disorder characterized by thrombocytopenia, increased mean platelet volumes, decreased platelet responsiveness to aggregating agents, and significant defects in platelet ultrastructural morphology leading to prolonged bleeding times and bleeding.


extraskeletal Ewing sarcoma

description: A rare malignant neoplasm of the soft tissues. It is typically a disease of children and young adults. Most commonly occurs in the paravertebral region, chest wall, pelvis and lower extremities. Treatment includes local excision with consideration for post-operative chemotherapy and/or radiotherapy.


name: peripheral primitive neuroectodermal tumor

description: A small round cell tumor with neural differentiation arising from the soft tissues or bone.


name: XYLT1-congenital disorder of glycosylation


GM3 synthase deficiency

description: GM3 synthase deficiency is characterized by recurrent seizures (epilepsy) and problems with brain development. Within the first few weeks after birth, affected infants become irritable and develop feeding difficulties and vomiting that prevent them from growing and gaining weight at the usual rate. Seizures begin within the first year of life and worsen over time. Multiple types of seizures are possible, including generalized tonic-clonic seizures (also known as grand mal seizures), which cause muscle rigidity, convulsions, and loss of consciousness. Some affected children also experience prolonged episodes of seizure activity called nonconvulsive status epilepticus. The seizures associated with GM3 synthase deficiency tend to be resistant (refractory) to treatment with antiseizure medications.


name: congenital muscular dystrophy with intellectual disability


name: muscle-eye-brain disease with bilateral multicystic leucodystrophy

description: Muscle-eye-brain (MEB) disease with bilateral multicystic leucodystrophy is a form of congenital muscular alpha-dystroglycanopathy with brain and eye anomaly characterized by severe muscle-eye-brain disease-like phenotype associated with macrocephaly and extended bilateral multicystic white matter disease, overlapping with the cerebral findings in patients with megalencephalic leukoencephalopathy with subcortical cysts.


name: congenital muscular dystrophy with hyperlaxity

description: Congenital muscular dystrophy with hyperlaxity is a rare, genetic neuromuscular disease characterized by congenital hypotonia, generalized, slowly progressive muscular weakness, and proximal joint contractures with distal joint hypermobility and hyperlaxity. Scoliosis or rigidity of the spine and delayed motor milestones are also frequently reported. Other manifestations include a long myopathic face and, in rare cases, respiratory failure, mild to moderate intellectual deficiency and short stature. Ambulation may be impaired with time.


name: qualitative or quantitative defects of alpha-dystroglycan


description: A rare genetic chronic skeletal disorder characterized by peripheral osteolysis (especially carpal and tarsal bones), interphalangeal joint erosions, subcutaneous fibrocollagenous nodules, facial dysmorphism, and a wide range of associated manifestations.