Congenital or berry aneurysm in the optic nerve.

A case is presented of a 67-year-old woman with hypertension and arteriosclerosis who died from cerebral infarction. There was an associated arteriosclerotic aneurysm of the right vertebral artery, and incidental congenital or berry aneurysms of the anterior communicating and left internal carotid or anterior cerebral artery. The latter aneurysm was situated within the left optic nerve.