The Journal of the Korean bone and joint tumor society (대한골관절종양학회지)
- Volume 4 Issue 1
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- Pages.59-64
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- 1998
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- 1226-4962(pISSN)
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- 2233-9841(eISSN)
Dedifferentiated Parosteal Osteosarcoma - A case report -
역분화 방골성 골육종 - 증례 보고 1 례 -
- Kim, Tae-Seung (Department of orthopedic surgery, College of Medicine, Hanyang university) ;
- Song, Sang-Jun (Department of orthopedic surgery, College of Medicine, Hanyang university) ;
- Choi, Il-Yong (Department of orthopedic surgery, College of Medicine, Hanyang university)
- Published : 1998.03.30
Abstract
Parosteal osteosarcoma is characterized as a densely ossifying lesion, usually occurring on the surface near the metaphyses of a long bone. The histological pattern is a well- differentiated mature bone trabeculae with a hypocellular spindle-cell stroma. The cytological details are those of a low-grade malignant lesion. The natural history of this lesion is indolent local growth, late invasion of the underlying bone, and infrequently, distant metastasis. However, there is a significant risk of eventual dedifferentiation into a high-grade lesion. We report here-a case of parosteal osteosarcoma dedifferentiated into a high-grade lesion, which occurred in the left distal femur of a 40-years-old woman, and discuss the experience in detail.