Submitted by Carol Ireland
is a congenital abnormality typically involving a facial birthmark (called a port wine stain or angioma) and a leptomeningeal angioma (or birthmark on the brain). Neurological symptoms can include seizures, developmental delay or intellectual disability, weakening of one side of the body and visual deficits. The brain involvement is mostly on one side but can also be on both sides of the brain. Seizures can be severe and difficult to control.