Abstract

517 Background: It has been reported that patients with single gastric cancer or adenoma are at increased risk of colorectal cancer or adenoma. However, the incidence of colorectal adenoma in patients with multiple gastric neoplasms has not been discussed yet. Methods: We retrospectively analyzed the esophagogastroduodenoscopic and colonoscopic findings as well as the clinicopathologic features between October 2012 and July 2014. The aim of this study was to investigate whether the incidence of colorectal adenoma is higher or not in patients with multiple gastric neoplasms than those with a single gastric neoplasm. Results: A total of 164 patients with gastric neoplasm were divided into two groups whether the number of lesions was single or multiple. Among the 138 patients with single gastric neoplasm, 51 patients performed colonoscopy for surveillance study and 9 patients underwent colonoscopy among the 26 patients with multiple gastric neoplasms. Colorectal adenoma were detected in 58.8% (30/51) of the single gastric neoplasm group, and in 88.8% (8/9) of the multiple gastric neoplasms group (p < 0.001). The mean number of colorectal adenomas was significantly higher in the multiple gastric neoplasm group than in the single group. (4.78 vs. 1.94, p = 0.013). The age, sex, BMI, presence of underlying diseases and the degree of gastric dysplasia were not significantly different between the two groups. Conclusions: The prevalence and the number of colorectal adenoma were significantly higher in patients with multiple gastric neoplasms than in those with single gastric neoplasm. Clinical trial information: KUGH14308-001.

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