[A case of advanced gastric cancer with peritoneal dissemination successfully treated with S-1 and intraperitoneal docetaxel administration].

A 76-year-old man was admitted to our hospital for the treatment of remnant gastric cancer. Laparotomy revealed massive lymph node metastasis, direct invasion of the transverse colon, and peritoneal dissemination. Partial resection of remnant stomach with transverse colon and intraperitoneal infuser port implantation were performed. After surgery, he underwent chemotherapy with docetaxel(DOC)administered intraperitoneally, and S-1. CT scan showed no tumors, and the patient was judged to be a complete response(CR)without serious adverse events. We switched DOC to intravenous injection because of port damage, and grade 3 adverse events appeared frequently until the chemotherapy was stopped. It has been 30 months since we stopped the chemotherapy, and the patient is still alive with no evidence of tumor recurrence 48 months after surgery.

Carcinosarcomas (malignant mullerian mixed tumors) of the uterus and ovary: a genetic study with special reference to histogenesis.

The histogenesis of carcinosarcomas (malignant mullerian mixed tumors) of the female genital tract is still not completely understood. In the present study, several different molecular pathologic techniques were applied to determine the histogenesis of 15 uterine and ovarian carcinosarcomas. The patterns of X-chromosome inactivation and the presence of p53 and K-ras mutations were analyzed in the carcinomatous and sarcomatous components. Microsatellite analysis was also performed. Ten tumors were monoclonal, one was biclonal (collision tumor), and another was probably biclonal; the other three were of indeterminate histogenesis. These data indicate that most uterine and ovarian carcinosarcomas are monoclonal.