a p w a c n D o 19-year-old woman presented with intermittent rectal bleeding for 6 months. There were 2 episodes of gastrontestinal bleeding associated with syncope 2 months before urrent admission. Physical examination was unremarkable exept for pale conjunctivae. The hemoglobin level was 9.8 g/dL normal range, 12–16 g/dL). Multiple modalities including uper gastrointestinal endoscopy, colonoscopy, enterolysis, aniography, 99mTc-labeled red blood cell scintigraphy, multislice omputerized tomographic scans, and capsule endoscopy were erformed during the previous 6-month period, but no definite leeding lesion was identified. Subsequently, double-balloon nteroscopy was performed and only revealed a wide-mouth iverticulum in the ileum with a polypoid lesion in the blind nd (Figure A). Focal hyperemic mucosa coating with blood on he polypoid lesion indicating recent bleeding also was noted. t laparotomy, a 6.0-cm Meckel’s diverticulum was found in the leum, 65 cm proximal to the ileocecal valve (Figure B). The iverticulum was resected surgically and proven pathologically o have ectopic gastric mucosa in the blind end (Figure C). The atient then was discharged on the 10th day of hospitalization. here was no further episode of bleeding after 1-year of folow-up evaluation. Meckel’s diverticulum is the most common congenital anomly of the gastrointestinal tract and occurs in 1%–3% of the opulation. Approximately half of Meckel’s diverticula is lined ith ectopic gastric mucosa.1 Lower gastrointestinal bleeding is common presentation of Meckel’s diverticulum, especially in hildren. Diagnosis of Meckel’s diverticulum can be made by uclear scan, small-bowel series, or rarely by barium enema. ouble-balloon enteroscopy rarely is used as a diagnostic tool f Meckel’s diverticulum. Our patient, with a 6-month history