[Remission due to CYVADIC chemotherapy of primary leiomyosarcoma derived from mesentelium of the sigmoid colon: a case report].

We report a case of leiomyosarcoma of mesenthelium origin, which was successfully treated with a combination of cyclophosphamide, vincristine, adriamycin and dacarbazine (CYVADIC). A 56-year-old woman received three courses of adjuvant CYVADIC chemotherapy after initial surgery consisting of tumorectomy, sigmoidectomy, descending colostomy, cystectomy and ureterostomy. A six-month disease-free period was attained obtained. A recurrent tumor showed remarkable reduction after three courses of CYVADIC chemotherapy. This case may be the first report of successful chemotherapy against a leiomyosarcoma of mesenthelium origin in Japan.