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罕见腰椎椎旁非创伤性骨化性肌炎1例
Myositis ossificans (MO), also known as myositis ossificans circumscripta (MOC), describes a pathologic process of which localized, nonneoplastic heterotopic bone formation occurs in muscles or other soft tissues[1-2].Although traumatic MO has been reported occasionally,MO located in lumbar paraspinal muscles without a history of trauma has been rarely seen.To our best knowledge, it is the fifth such case as nontraumatic MO located in the lumbar paraspinal muscles and first young case misdiagnosed as epithelium-like tumor.