| extraosseous osteosarcoma |
a rare neoplasm occurring in the soft tissues of the body, generally in the thighs, composed of sarcomatous tissue that produces malignant osteoid and bone; it is histologically identical to osteosarcoma occurring in bone.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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