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Diagnostic imaging of myositis ossificans and calcified or ossified sarcoma Nozomi Oki 1 1Department of Radiological Science Nagasaki University, Graduate School of Biomedical Sciences Keyword: 骨化性筋炎 , 骨化・石灰化 , string sign pp.1317-1324
Published Date 2021/10/10
DOI https://doi.org/10.18888/rp.0000001761
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Soft tissue lesions often contain bone or cartilage matrix. The identification of ossification or calcification in a soft tissue lesion is important because it can narrow the differential diagnosis or be suggestive of a certain diagnosis. Myositis ossificans is a self-limiting, reactive, bone-forming process of soft tissue in patients with or without a history of trauma. On radiographs and CT, mature stage of myositis ossificans typically present as a round calcified lesion with a radiolucent center. However, in earlier stages, the peripheral calcification may not be well visualized, leading to misdiagnosis. MR findings of myositis ossificans are often nonspecific, because calcification or ossification is not reliably identified. This article focuses on myositis ossificans and describe soft tissue lesions in which presence of ossification or calcification can be a key for the diagnosis.


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