A Case of Ascending Colon Cancer Associated with Japanese Schistosomiasis

Abstract

We report a case of ascending colon cancer associated with Japanese Schistosomiasis. An 80-year old man was admitted to the hospital for occult blood stool who had lived in Kofu, Yamanashi Prefecture, a past endemic area of Japanese Schistosomiasis until the age of 15. Colonoscopy showed a type2 tumor of the ascending colon. Laparoscopic right-hemicolectomy with D3 lymph node dissection was performed. Pathological findings demonstrated moderately differentiated adenocarcinoma, tub2, med, SS, INFb, int, ly1, v0, N0, PM0, DM0, RM0. In addition, Schistosoma japonicum eggs showing calcification were seen in the submucosa of the colonic lesion. This case was considered to be an old lesion.