Congenital stromal corneal dystrophy

Congenital stromal corneal dystrophy (CSCD) is an extremely rare, autosomal dominant form of corneal dystrophy.

[2] The main features of the disease are numerous opaque flaky or feathery areas of clouding in the stroma that multiply with age and eventually preclude visibility of the endothelium.

Strabismus or primary open angle glaucoma was noted in some of the patients.

Thickness of the cornea stays the same, Descemet's membrane and endothelium are relatively unaffected, but the fibrils of collagen that constitute stromal lamellae are reduced in diameter and lamellae themselves are packed significantly more tightly.

[citation needed] CSCD is associated with a mutation in the gene DCN that encodes the protein decorin, located at chromosome 12q22.

Congenital stromal dystrophy. Transmission electron microscopy of the corneal stroma showing normal collagen lamellae separated by abnormal randomly distributed collagen filaments in an electron-lucent extracellular matrix.