The Prevalence of Colorectal Neoplasia in Patients With Gastric Cancer: A Korean Association for the Study of Intestinal Disease (KASID) Study

GOALSThe goal of this study was to determine the prevalence of colorectal neoplasia, using colonoscopy surveillance, in a cohort of patients with gastric cancers. BACKGROUNDThe association between gastric cancer and colorectal cancer has been conflicting. STUDYA total of 543 patients (males, 362; females, 181) with gastric cancer were matched with 2 persons from the population without a diagnosis of gastric cancer as confirmed by endoscopy according to age (±2 y), sex, date of colonoscopy examination (±2 wk), and endoscopist. Main Outcome was the prevalence of colorectal neoplasia diagnosed by colonoscopy. RESULTSA significantly higher colorectal cancer prevalence was found in the gastric cancer group, that is, 19 of 543 (3.5%) versus 14 of 1086 (1.3%; P