Fibromuscular hyperplasia of the extracranial internal carotid artery

✓ Fibromuscular hyperplasia is an alteration of the arterial wall, affecting mostly middle-aged women. When localized to the internal carotid arteries, it can give symptoms of intermittent or permanent cerebral ischemia, but is usually asymptomatic. Three cases, all of them accidental angiographic findings, are used as a basis for discussion of the angiographic features, differential diagnosis, and surgical treatment.