DefinitionBy Mayo Clinic staff
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Fibromuscular dysplasia (FMD) is a condition that causes narrowing (stenosis) and enlargement (aneurysm) of the medium-sized arteries in your body. The areas of narrowing and bulging occur next to each other and can cause the artery to narrow so much that organs that receive blood from the artery are damaged.
Fibromuscular dysplasia can cause a number of complications, such as high blood pressure or tears of the artery (dissection), if left untreated.
Fibromuscular dysplasia appears most commonly in the arteries leading to the kidneys. Fibromuscular dysplasia can also affect the arteries leading to your brain, abdomen, arms and legs. While there isn't a cure for fibromuscular dysplasia, it can be treated effectively.
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