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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
RESEARCH SUPPORT, U.S. GOV'T, P.H.S.
The risk of upper gastrointestinal cancer in familial adenomatous polyposis.
Gastroenterology 1992 June
Adenomas with potential for malignancy occur frequently in the upper gastrointestinal tract of patients with familial adenomatous polyposis. However, an assessment of relative risk of upper gastrointestinal cancer in patients with adenomatous polyposis has never been performed. Therefore, the incidence rate of upper gastrointestinal cancer in patients with familial adenomatous polyposis in The Johns Hopkins Registry was compared with the rate of the general population through person-year analysis with adjustment for demographics. There was an increased relative risk of duodenal adenocarcinoma (relative risk, 330.82; 95% confidence limits, 132.66 and 681.49; P less than 0.001) and ampullary adenocarcinoma (relative risk, 123.72; 95% confidence limits, 33.65 and 316.72; P less than 0.001). No significant increased risk was found for gastric or nonduodenal small intestinal cancer. These results indicate that periodic surveillance of the upper gastrointestinal tract for duodenal and periampullary cancer is needed in patients with familial adenomatous polyposis. Prophylactic duodenectomy is a consideration when large adenoma(s) with high-grade dysplasia are identified but awaits risk benefit analysis.
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