The Journal of the Korean bone and joint tumor society (대한골관절종양학회지)

The Korean Musculoskeletal Tumor Society (대한근골격종양학회)
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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)
  • 김태승 (한양대학교 의과대학 정형외과학교실) ;
  • 송상준 (한양대학교 의과대학 정형외과학교실) ;
  • 최일용 (한양대학교 의과대학 정형외과학교실)
  • Published : 1998.03.30
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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.

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