Myositis ossificans is differentiated from other reactive fibroblastic proliferations by the presence of: September 2009

Ans. C: Metaplastic bone Myositis ossificans usually develops in the athletic adolescents and young adults and follows an episode of trauma in more than 50% of cases. The lesion typically arises in the musculature of proximal extremities. It shows metaplastic bone. It should be differentiated from extraskeletal osteosarcoma.