Corneal Dystrophy, Fuchs Endothelial, 4

A number sign (#) is used with this entry because of evidence that Fuchs endothelial corneal dystrophy-4 (FECD4) is caused by heterozygous mutation in the SLC4A11 gene (610206) on chromosome 20p13.

Description

Fuchs endothelial corneal dystrophy (FECD) is the most common genetic disorder of the corneal endothelium. Late-onset FECD is marked by thickening of Descemets membrane and excrescences, called guttae, that typically appear in the fourth or fifth decade. Disease progression results in decreased visual acuity as a result of increasing corneal edema, and end-stage disease is marked by painful epithelial bullae (summary by Riazuddin et al., 2013).

For a discussion of genetic heterogeneity of Fuchs endothelial corneal dystrophy, see FECD1 (136800).

Molecular Genetics

Vithana et al. (2008) analyzed the SLC4A11 gene (610206) in 89 patients with late-onset FECD, 8 of whom had a family history of FECD, and identified 4 heterozygous mutations in 1 familial and 3 sporadic cases (610206.0017-610206.0020), respectively.