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Int J Shoulder Surg. 2012 Jan;6(1):19-22. doi: 10.4103/0973-6042.94315.

Myositis ossificans circumscripta of the triceps due to overuse in a female swimmer.

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Department of Musculoskeletal Science, Division of Orthopedics, Pellenberg, Leuven, Belgium.


Myositis ossificans is a rare condition characterized by non-neoplastic heterotopic bone formation in soft tissue and skeletal muscle. It is a benign and often self-limiting disease with no need for surgery. Here, we describe a young female swimmer with myositis ossificans circumscripta of the triceps due to overuse. Because of the benign character of the lesion, conservative treatment was initiated with rest and anti-inflammatory drugs. She obtained complete resolution after 6 months and was able to return to normal sporting activities. Myositis ossificans circumscripta is a rare benign lesion with an excellent prognosis. Most lesions in athletes occur due to contusions or strains; however, overuse is now described as well. Spontaneous resolution is seen in almost all cases. Cases in which, despite conservative treatment, a painful mass persists, surgical excision can be considered.


Myositis ossificans circumscripta; overuse; soft tissue tumor; triceps

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