[Chorioretinal coloboma and neovascular membrane].

Retinochoroidal coloboma results from an incomplete closure of the ocular embryonic fissure. Uni or bilateral, the coloboma can be associated with cataract, microphthalmia, retinal detachment... but rarely with neovascularization. This association is comparable with subretinal neovascularization in high myopia, angioid streaks, choroiditis and choroidal ruptures. The disruption of the normal anatomy of the Bruch's membrane is a possible entry site of choroidal blood vessels. But the reason why only rare cases are reported is unknown.