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Non-traumatic myositis ossificans circumscripta: A diagnosis trap
Ahmed El Bardouni1, Monsef Boufettal1, Fouad Zouaidia2
1Department of Orthopedic Surgery, Ibn Sina Hospital, University Mohamed V, Rabat, Morocco.
Journal of Clinical Orthopaedics and Trauma
|May 19, 2015
Summary
Myositis ossificans circumscripta (MOC) is a rare benign bone growth. This case highlights a non-traumatic MOC in the thigh, mimicking a malignant neoplasm, emphasizing its importance in differential diagnoses.
Area of Science:
- Orthopedics
- Pathology
- Radiology
Background:
- Myositis ossificans circumscripta (MOC) is a benign heterotopic bone formation.
- Trauma is a common cause, making non-traumatic MOC rare.
- MOC commonly affects high-risk injury sites like the thigh, buttock, and elbow.
Purpose of the Study:
- To report a rare case of non-traumatic myositis ossificans circumscripta.
- To highlight its clinical and radiological presentation mimicking malignancy.
- To emphasize MOC's inclusion in the differential diagnosis of soft tissue tumors.
Main Methods:
- Case report of a patient with non-traumatic MOC.
- Clinical examination and radiological assessment (imaging studies).
- Differential diagnosis considerations including osteosarcoma and soft-tissue sarcoma.
Main Results:
- A rare case of non-traumatic MOC of the thigh was identified.
- The condition presented clinically and radiologically as a malignant neoplasm.
- Histopathological confirmation of benign heterotopic bone formation.
Conclusions:
- Non-traumatic MOC is exceptionally rare but clinically significant.
- MOC can mimic malignant tumors, necessitating careful differential diagnosis.
- Radiological and clinical features, though suggestive of malignancy, should prompt consideration of MOC.
