Extraosseous osteogenic sarcoma.
Extraosseous osteogenic sarcoma is a very rare malignant neoplasm. Out of the more than 400 cases of soft tissue sarcomas on file in our hospital, only 2 were extraosseous osteogenic sarcomas. Both were situated in the thigh. The first case was initially diagnosed as a hematoma and treated by marginal excision. The diagnosis of high-grade osteosarcoma primarily arising in soft tissue was made from histopathologic examination. Radiotherapy of 60 Gy in 30 fractions was given postoperatively. The second patient, primarily diagnosed as having a soft tissue sarcoma, was treated by wide excision. The final pathologic report was high-grade extraosseous osteogenic sarcoma. Adjuvant chemotherapy was given postoperatively. Both patients are alive without local recurrence and distant metastasis at postoperative 90-month and 107-month follow-up, respectively.
Lin
Shao-Ying
SY
Department of Orthopedics and Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC.
Chen
Wei-Ming
WM
Wu
Hungta H
HH
Chen
Winby York-Kwan
WY
Chen
Tain-Hsiung
TH
D000368:Aged; D003131:Combined Modality Therapy; D005260:Female; D006801:Humans; D012516:Osteosarcoma / Q000175:diagnosis / Q000473:pathology* / Q000628:therapy; D012509:Sarcoma / Q000175:diagnosis / Q000473:pathology* / Q000628:therapy