Subcutaneous anterior abdominal wall myositis ossificans

The differential diagnosis of abdominal wall lesions is broad and includes Myositis ossificans (MO). MO primarily arises in skeletal muscles, but can also occur around adjacent structures. It typically appears as a soft tissue lesion with peripheral rim of calcification. The Presented case is of 21-year-old woman with a right lower quadrant mass without a history of trauma but with a positive history of excessive exercise. Radiological images were nonspecific, and tissue biopsy showed features consistent with myositis ossificans. Follow up images revealed findings consistent with the histopathological diagnosis. This case highlights the nonspecific Imaging findings of MO in the early stages and that MO early stage can be prolonged.