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KMID : 0613320050110010088
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Journal of the Korean Bone and Joint Tumor Soceity
2005 Volume.11 No. 1 p.88 ~ p.93
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Recurrences and Changes of Histologic Subtype of Osteosarcoma arising in a Solitary Osteochondroma
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Sung Ki-Sun
Seo Jai-Gon
Song JG
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Abstract
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Malignant transformation of a solitary osteochondroma is rare, and usually takes form of a
chondrosarcoma. We present a case of low grade osteosarcoma arising in a solitary osteochondroma of the right femur in a 30-year-old woman. As the lesion was initially continuous with corresponding components of the parent bone, so the possibilities of other diagnoses were excluded. After the initial excision, there were 3 times of recurrences during the follow up period of 3 years. The histologic subtypes of the recurred osteosarcomas were different each other, which were high grade chondroblastic, osteoblastic and fibroblastic respectively.
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KEYWORD
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Osteochondroma, Osteosarcoma, Malignant transformation
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