Intestinal hemorrhage caused by Meckel's diverticulum with ectopic gastric mucosa on polypoid lesion: a case report

Meckel's diverticulum may sometimes present as an intraluminal polypoid mass causing small bowel obstruction; however, gastrointestinal bleeding due to Meckel's diverticulum with a polypoid lesion is rare. A 14-year-old girl presented with tarry stool and syncope in our hospital. Laboratory examination showed iron-deficiency anemia with a low hemoglobin level of 5.8 g/dl. The bleeding site was detected by neither upper gastrointestinal endoscopy nor colonoscopy. Transanal double-balloon enteroscopy showed a diverticulum with an ulceration at a site approximately 50 cm from the ileocecal valve and a polypoid lesion inside of the diverticulum. Histopathological examination of a polypoid lesion revealed an ectopic gastric mucosa of the fundic type. Furthermore, technetium-99m pertechnetate scintigraphy showed a hot spot in her lower right abdomen. On the basis of these findings, she was diagnosed as having hemorrhagic Meckel's diverticulum. Single-incision laparoscopy-assisted segmental bowel resection of the ileum was performed. The patient recovered well, and she was discharged from the hospital on postoperative day 7. She was doing well 6 months later without evidence of reoccurrence. In this report, we describe a case of Meckel's diverticulum with a polypoid lesion; hemorrhage may have occurred owing to the ulceration of the ileal mucosa with which the polypoid lesion directly came in contact. We consider this case to be of interest to gain insight into the site and mechanism of ulceration associated with Meckel's diverticulum.