A case report of synovial sarcoma in the left popliteal region.

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A 57-year-old female had the pain at her left popliteal region in September 1980, and followed by the tumor formation in May 1981. Because of a rapid growth since January 1982, she admitted to our hospital in March 1982. At admission, her tumor was elastic soft with 12cm in diameter, the irregular surface and the obscure margin, which was adhesive to gastrocunemius muscle. In April 1982, amputation above the knee was done. Microscopically, typical biphasic pattern with the mixture of fibrosarcomatous pattern and pseudoglandular pattern was revealed. In the latter, pseudoepithelial cells ware stained positively with PAS and Alcian Blue Stain. Adjuvant chemotherapy, consisted of Adriamycin, Cyclophosphamide and Vincristine, had been perfomed during the one year since March 1982. She is alive with the disease-free status one year three months after adjuvant chemotherapy.