Webchat Transcripts - Questions and Answers with a Physician

Fibromuscular dysplasia (FMD) is an uncommon disorder characterized by abnormal cellular growth in the walls of medium and large arteries. This abnormal cellular growth may lead to a beaded appearance of the affected artery and narrowing (stenosis) in some cases. Most cases—60 to 75 percent—occur in the renal artery, the artery leading from the abdominal aorta to the kidneys. Approximately 30 percent of cases involve the carotid arteries, the arteries in the neck that connect the heart and the brain. FMD also can affect the arteries to the legs, or less frequently, arteries in other parts of the body. In many cases, FMD is found in multiple arteries of the body.

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Reviewed: 01/19