Abstract
In one case, an 87-year-old woman with anemia underwent colonoscopy and was confirmed to have an irregular ulcer with stenosis of the transverse colon that was suspected to represent advanced colon cancer. We performed transverse colectomy, and the lesion was diagnosed as a benign ulcer by pathological examination. In the other case, an 81-year-old man with right lower abdominal pain underwent computed tomography, which showed a thickened wall of the ascending colon. We diagnosed colitis and started conservative treatment. Abdominal pain persisted, so we performed colonoscopy and identified a protruded lesion with ulcer in the ascending colon. We suspected advanced colon cancer and performed laparoscopic right hemicolectomy. The lesion was diagnosed as a benign ulcer by pathological examination after the operation.
We report two cases of benign colon ulcer diagnosed by postoperative pathological examination that we had suspected as advanced colon cancer on preoperative examination and resected surgically.
