Surgical Treatment Outcome of Patients with Colorectal Cancer Having Ulcerative Colitis

: This study aimed to evaluate the surgical treatment outcome of patients with colorectal cancer having ulcerative colitis (UC). METHODS: We examined 112 patients who underwent the surgery from 1998 to 2016. Among the 112 patients, 14 were complicated with malignant tumor(9 with colorectal cancer and 5 with dysplasia-assciated lesion or mass)We performed group comparison between patients with(group A)and without(group B)colorectal cancer. RESULTS: The median age in group A was 58.1 years, which was significantly older than that in group B. The duration of disease in group A was 13.2 years, which was significantly longer than that in group B. Surgical procedures in group B were as follows; 5 cases had ileoanalanastomosis (IAA), 4 cases had ileo-analcanalanastomosis (IACA), 2 cases had ileorectal anastomosis(IRA), and 1 case had interspincteric resection(ISR) and abdominoperinealresection (APR)Laparoscopic sigmoid colectomy was performed in a patient aged 52 years because he was diagnosed with sporadic sigmoid colon cancer. Periodic endoscopic screening was not performed in 5 patients with pT2 colorectalcancer in group B. endoscopic submucosaldissection (ESD)was performed in 2 patients aged>70 years with rectal pTis cancer. CONCLUSION: Elderly patients with UC were often complicated with colorectalcancer, and these patients are indicated for surgicalprocedures other than IAA to preserve defecation function. Patients with UC should undergo periodic endoscopic screening for early detection of malignant tumor and definitive surgicalresection.