Myositis ossificans composed of fibroblasts and focal deposits of osteoid. Hematoxylin and eosin stain; original magnification ×100.Non-traumatic myositis ossificans mimicking a malignant neoplasm in an 83-year-old woman: a case report. Nishio J, Nabeshima K, Iwasaki H, Naito M - Journal of medical case reports (2010). Not Altered. CC.