title: Double-balloon endoscopy WAS effective in diagnosing small intestinal duplication: a case report.
abstract: BACKGROUND
  Ileal duplications are encountered infrequently in adults, because symptoms including abdominal pain, intussusception, hemorrhage, and perforation usually present in early childhood. In this report, we present an adult case of ileal duplication that was revealed by double-balloon endoscopy (DBE).
  
  
  METHODS
  A 73-year-old Japanese man presented with anemia and melena. Anal DBE detected the narrow opening of an extra lumen in the ileum about 100 cm proximal to the ileocecal valve. Enteroclysis via DBE showed a 5-cm-long ileal diverticulum-like structure at the mesenteric side of the ileum. No ectopic gastric mucosa was detected by technetium-99m pertechnetate scintigraphy. The final diagnosis was ileal duplication.
  
  
  RESULTS
  This is the first report of tubular ileal duplication diagnosed by using DBE. The small intestinal duplication opening was not detected by using VCE and plane CT in this case, but was found by using DBE.
  
  
  CONCLUSIONS
  The present case demonstrates that DBE was useful in the diagnosis of an adult small intestinal duplication that was not visualized by other modalities.
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan.
authors.forename: Yuji
authors.identifier: 0000-0001-7081-8746
authors.initials: Y
authors.lastname: Nadatani
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan ; SAMURAI GI Research Centre, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, 545-8585 Japan.
authors.forename: Toshio
authors.initials: T
authors.lastname: Watanabe
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Sugawa
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan.
authors.forename: Shinpei
authors.initials: S
authors.lastname: Eguchi
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan.
authors.forename: Sunao
authors.initials: S
authors.lastname: Shimada
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Otani
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan.
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Yamagami
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan ; SAMURAI GI Research Centre, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, 545-8585 Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Tanigawa
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan.
authors.forename: Masatsugu
authors.initials: M
authors.lastname: Shiba
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan ; SAMURAI GI Research Centre, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, 545-8585 Japan.
authors.forename: Kazunari
authors.initials: K
authors.lastname: Tominaga
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan ; SAMURAI GI Research Centre, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, 545-8585 Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Fujiwara
authors.affiliation: Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan.
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Arakawa
keywords: Double-balloon endoscopy; Ileal duplication; Small intestine