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[Diagnostic and therapeutic aspects of myositis ossificans (author's transl)].

Diagnosis of localised myositis ossificans is difficult in the initial stage. A history of trauma is frequently missing. Clinical symptoms point in the direction of osteomyelitis or soft tissue abscess. Sonotomography is useful for localisation and delineation of the lesion. Biopsy is the only reliable method to establish the diagnosis. Conservative treatment is recommended until the process is inactive. Radiographic follow-up will demonstrate the expected massive calcification and scintigraphic follow-up at 6-monthly intervals will eventually prove the metabolic inactivity of the lesion necessary for successful operation. Surgical removal of the calcified tumor will become necessary in cases of continued pain or significant functional limitations of the involved extremity.