Deep muscle contusion complicated by myositis ossificans (a.k.a. heterotopic bone).
One muscle trauma is a common injury in contact sports. The most extensively damaged muscle is that segment closest to the underlying bone. By an unknown mechanism, this injured muscle can become transformed into heterotopic bone, a complication also called myositis ossificans. It is best managed conservately and rarely requires surgery.
Berg
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New Hampshire Bone and Joint Institute, Bedford, New Hampshire, USA.
D000293:Adolescent; D003288:Contusions / Q000150:complications* / Q000000981:diagnostic imaging* / Q000628:therapy; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000293:injuries*; D009221:Myositis Ossificans / Q000000981:diagnostic imaging* / Q000209:etiology* / Q000601:surgery; D010027:Osteotomy; D015865:Racquet Sports / Q000293:injuries*; D011859:Radiography; D013848:Thigh