Overview

Fibromuscular dysplasia is a condition that causes narrowing (stenosis) and enlargement (aneurysm) of the medium-sized arteries in your body. Narrowed arteries can reduce blood flow and affect the function of your organs.

Fibromuscular dysplasia appears most commonly in the arteries leading to the kidneys and brain. Fibromuscular dysplasia can affect other arteries, including those leading to your legs, heart, abdomen and, rarely, the arms. It's possible to have more than one affected artery.

Treatments are available, but there isn't a cure for fibromuscular dysplasia.