[A case of peritoneal malignant mesothelioma with disappearance of ascites result of intraperitoneal instillation of mitomycin C and oral administration of UFT].

We reported a 65-year-old man with peritoneal malignant mesothelioma which was discovered by hydrocele of left undescended testis. Initially, intraperitoneal instillation of CDDP 100 mg/body accompanied with aspiration of ascites was not effective. Secondarily, instillation of MMC 10 mg/body every other week was performed five times, and ascites completely disappeared. After that oral administration of UFT 300 mg/day, which was added to instillation of MMC 10 mg/body every four week, has been performed. Cytology of ascites changed to negative, and the clinical remission has continued ever since.