[Long-Term Survival of a Patient with Colon Cancer with Peritoneal Dissemination]

This case involves a 76 year-old woman. A sigmoidectomy was performed for sigmoid colon cancer in August 2006. On histological examination, the cancer was shown to be tub2>tub1>por2, pSE, int, INF b, ly2, v0, pN0, p1 (Douglas), Stage Ⅳ. After surgery, 4 courses of FOLFOX and 8 courses of TS-1 plus CPT-11 were administered after UFT plus LV was performed. Because of suspected recurrence at the anastomotic site, a partial colectomy was performed in September 2010, and TS-1 was started after surgery. In March 2012, the carcinoembryonic antigen level had increased to 13.7 ng/mL. Irregular masses with spicula, 13×15 mm and 19×23 mm on the right and left sides, respectively, were observed on chest computed tomography, and lung metastasis was suspected. Left lower and partial right middle lobectomies were performed. After surgery, the tumor marker levels were normalized. Chemotherapy was not performed. Currently, at 2 years 8 months after resection of the lung metastases, no recurrence was observed. Long-term survival in cases of colon cancer with peritoneal dissemination is rare, but multidisciplinary treatment, including surgical treatment, showed the promising possibility of long-term survival.