Myositis ossificans is differentiated from other reactive fibroblastic proliferations by the presence of:September 2009: (A) Dysplastic bone, (B) Dystrophic bone, (C) Metaplastic bone, (D) Hyperophic bone
Answer is C. Ans. C: Metaplastic boneMyositis 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.