label: Autosomal Recessive Osteopetrosis 1
label_lc: autosomal recessive osteopetrosis 1
description: "A sub-type of autosomal recessive osteopetrosis caused by mutation(s) in the TCIRG1 gene on chromosome 11q13, encoding the osteoclast-specific (alpha 3) subunit of the vacuolar proton pump. It is characterized by macrocephaly, frontal bossing, nystagmus, optic atrophy, blindness, deafness, and facial palsy."