Bietti Crystalline Corneoretinal Dystrophy

**Semantic type:** Disease or Syndrome

**Definition:** An autosomal recessive condition caused by mutation (s) in the CYP4V2 gene, encoding cytochrome P450 4V2. It is characterized by multiple glistening intraretinal crystalline deposits scattered throughout the posterior pole associated with progressive atrophy of the retinal pigment epithelium and choroidal sclerosis. The crystalline deposits are also present in the corneal limbus in some individuals.

**Synonyms:** - BCD