MedGen

Mutations in the CRYAB gene have been found to cause multiple types of cataract, which have been described as congenital posterior polar, congenital lamellar, and juvenile. Autosomal dominant and autosomal recessive forms have been described. The preferred title/symbol of this entry was formerly 'Cataract, Posterior Polar, 2; CTPP2.' [from OMIM]

A cataract that produces swelling and opacity of the entire lens; cataracts are removed before maturity. [from MONDO]

Mutations in the CRYGD gene have been found to cause multiple types of cataract, which have been described as aculeiform, crystalline aculeiform, crystalline, crystal, frosted, needle-shaped, fasciculiform, congenital cerulean, nonnuclear polymorphic congenital, central nuclear, lamellar, and punctate. Some patients also exhibit microcornea. Because multiple types of cataract are caused by mutation in the CRYGD gene, some of which display intrafamilial variability, several earlier distinct cataract entries in OMIM have been included here. [from OMIM]

A type of Congenital cataract in which the opacities occupy the subcapsular cortex at the anterior or posterior pole of the lens. [from HPO]

A polar cataract that affects the posterior pole of the lens. [from HPO]

Mutations in the FYCO1 gene have been identified in families with autosomal recessive cataract described as congenital and congenital nuclear. The preferred title/symbol of this entry was formerly 'Cataract, Autosomal Recessive Congenital 2; CATC2.' [from OMIM]

Zonular cataracts are defined to be cataracts that affect specific regions of the lens. [from HPO]

Mutations in the CHMP4B gene have been found to cause multiple types of cataract, which have been described as posterior polar, progressive posterior subcapsular, nuclear, and anterior subcapsular. The preferred title/symbol of this entry was formerly 'Cataract, Posterior Polar, 3; CTPP3.' [from OMIM]

Cerulean cataract, first described by Vogt (1922), is an autosomal dominant, early-onset, bilateral cataract with complete penetrance. Newborns appear asymptomatic until the age of 18 to 24 months, at which time they can be clinically diagnosed by slit-lamp examination through the appearance of tiny blue or white opacities that form first in the superficial layers of the fetal lens nucleus. The opacities progress throughout the adult lens nucleus and the cortex, forming concentric layers, with central lesions oriented radially. Histologically the lesions appear to be tapered cavities between lens fibers. Progression of the cataract is slow, such that patients may have lens extractions between the ages of 16 and 35 years (Armitage et al., 1995). The preferred title/symbol of this entry was formerly 'Cataract, Congenital, Cerulean Type, 1; CCA1.' [from OMIM]

A cataract is an opacity or clouding that develops in the crystalline lens of the eye or in its capsule. [from HPO]