Pathological findings from two cases of choroideremia.

Light and electron microscopic study of material from two cases of old, quiescent choroideremia led to three conclusions: there was nearly total loss of the outer segments of the visual receptors, there was reduplication of the basement membrane of the pigment epithelium and thickening of Bruch's membrane, and there was gliosis of the inner part of the retina and a preretinal membrane.