FIBROMUSCULAR HYPERPLASIA

Abstract
Fibromuscular hyperplasia (FMH) is an arterial dysplasia of unknown etiology which can affect muscular arteries of small or moderate size in many parts of the body. It is most often discovered in the renal [See figure in the PDF file] arteries of young, hypertensive adult females. Bilateral involvement of paired arteries appears to be common. Case reports of 3 patients are presented to illustrate the occurrence of the lesion in extrarenal arteries. The incidence of both symptomatic and asymptomatic intracranial aneurysms in a group of patients with arterial FMH was unusually high.