Choroidal neovascularization

What it means

Choroidal neovascularization (CNV) is the inward growth of new blood vessels arising from the choriocapillaris. Depending on the stage of development, they can be external (type 1 NV) or internal (type 2 NV) to the retinal pigment epithelium.

Choroidal neovascularization can be extrafoveal, subfoveal, or juxtafoveal.

Rare diseases that can present with this12

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Choroidal neovascular membrane