A 56-year-old woman with positive genetic testing of hereditary nonpolyposis colorectal cancer (HNPCC), many familiar history of different neoplasia (Fig. 1), and a personal history of hysterectomy due to an endometrial cancer was referred to our Unit because of anemia with a positive fecal occult blood test. Both, gastroscopy and colonoscopy were performed with the only result of less than 10 hyperplastic colonic polyps without signs of recent bleeding. An abdominal CT was also performed and was completely normal. According to these results, it was indicated a capsule endoscopy that showed a stenotic polypoid lesion near of the Treitz angle. The capsule stayed retained and its battery went off at this point. With the objective of making a histological diagnosis and removing the capsule endoscopy, a double balloon endoscopy was performed, and
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