[Diagnostic problems of circumscribed myositis ossificans: presentation of an atypical case]

Published online: Sep 27 1998

J L Gielen, Y Lecomte, and J C Bienfait.

Service de Chirurgie Orthopédique et de Traumatologie, Clinique de l'Espérance, Montegnée, Belgium.


The authors report the case of a 22-year-old female suffering from thigh pain for 5 months. The first diagnosis considered was circumscribed myositis ossificans but the duration of symptoms and the radiological aspect mimicking some malignant features led to consider parosteal sarcoma as a possible diagnosis. Surgical resection was therefore requested and histological analysis confirmed the diagnosis of circumscribed myositis ossificans. This case emphasizes the difficulty in differentiating circumscribed myositis ossificans from a slowly growing tumor as both can be associated with increasing pain and a malignant radiological aspect. A surgical approach is therefore frequently necessary for definitive diagnosis and treatment.