Article:

Myositis Ossificans in the Shoulder – A Case Report

Abstract: Myositis ossificans is a non-neoplastic, rare medical condition characterized by heterotopic bone formation in non-skeletal muscle or soft tissues. It is an idiopathic disorder in which trauma plays a significant contributing role, typically appearing 4 to 12 weeks after the injury. While the elbow is the most common site, myositis ossificans can occur anywhere in the body and is particularly common in young athletes, especially males in their second to third decades of life. This case study reports the observation of a 27-year-old male who presented with a shoulder mass 9 years after trauma sustained while playing volleyball. The condition was diagnosed as myositis ossificans in the shoulder, around the deltoid muscles. Excision of the mass was performed after confirmation through MRI scans and biopsy.