Abstract
We experienced two cases of multiple colorectal cancer and multiple dysplasia. Case 1: A 60-year-old male who had been suffering from ulcerative colitis for 8 years underwent total colectomy and ileostomy with a diagnosis of rectal cancer. He had multiple dysplasia and two cancers including well and poorly differentiated adenocarcinoma in the lower and upper portions of the rectum, respectively.
Case 2: A 56-year-old female had been suffering from serious ulcerative colitis for 14 years. Surveillance colonoscopy found her multiple dysplasia-associated lesions or mass and she underwent total colectomy and ileostomy. Patients with ulcerative colitis belong to the high risk group developing colorectal cancer. It is important to find dysplasia at surveillance. The existance of dysplasia-associated lesions or masses suggest the presence of cancer or potential to cancer, and are possible candidates for operation. We think it is desirable to resect colorectal mucosa as much as possible which may have a potential to malignacy in the presence of cancer as well as dysplasia.
