SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Calcified knee artery. X-ray of the knee of a patient with arteritis (inflammation of the arteries). The popliteal artery (white) has calcified, making it visible on the X-ray. The calcified area of the artery is seen on the head of the tibia (lower centre), in this frontal view. The femur (upper frame) and the fibula (left of tibia) are also seen. Arteritis has many causes, including infection and autoimmune responses. Treatment is with steroid drugs to reduce the inflammation. Complications include calcification (hardening of the arteries with calcium deposits) and thrombosis (abnormal blood clotting).
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