myositis ossificans

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A condition in which calcium, and eventually bone, become deposited in muscle (often the quadriceps); after severe bruising or a fracture. It usually takes a few weeks after the injury for myositis ossificans to develop. The calcium deposits are usually reabsorbed with no long-term effects, but the reabsorption may take several months. During this time, it is best to avoid aggressive rehabilitation of the muscle as this may result in microinjuries and pain, which delays return to sport. Sometimes calcium deposits, especially those near the muscle insertion or origin, are not reabsorbed. These deposits may be severely disabling and may need to be removed surgically. Recurrent myositis ossificans may be related to bleeding disorders and clotting deficiencies.

Subjects: Sports and Exercise Medicine.

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