title: Inverted Meckel's diverticulum preoperatively diagnosed using double-balloon enteroscopy.
abstract: An inverted Meckel's diverticulum is a rare gastrointestinal congenital anomaly that is difficult to diagnose prior to surgery and presents with anemia, abdominal pain, or intussusception. Here, we report the case of 57-year-old men with an inverted Meckel's diverticulum, who was preoperatively diagnosed using double-balloon enteroscopy. He had repeatedly experienced epigastric pain for 2 mo. Ultrasonography and computed tomography showed intestinal wall thickening in the pelvis. Double-balloon enteroscopy via the anal route was performed for further examination, which demonstrated an approximately 8-cm, sausage-shaped, submucosal tumor located approximately 80 cm proximal to the ileocecal valve. A small depressed erosion was observed at the tip of this lesion. Forceps biopsy revealed heterotopic gastric mucosa. Thus, the patient was diagnosed with an inverted Meckel's diverticulum, and single-incision laparoscopic surgery was performed. This case suggests that an inverted Meckel's diverticulum should be considered as a differential diagnosis for a submucosal tumor in the ileum. Balloon-assisted enteroscopy with forceps biopsy facilitate a precise diagnosis of this condition.
authors.affiliation: Kosuke Takagaki, Tatsuhiro Ito, Moriya Iwaizumi, Yasushi Hamaya, Ken Sugimoto, First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan.
authors.forename: Kosuke
authors.initials: K
authors.lastname: Takagaki
authors.affiliation: Kosuke Takagaki, Tatsuhiro Ito, Moriya Iwaizumi, Yasushi Hamaya, Ken Sugimoto, First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Osawa
authors.affiliation: Kosuke Takagaki, Tatsuhiro Ito, Moriya Iwaizumi, Yasushi Hamaya, Ken Sugimoto, First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan.
authors.forename: Tatsuhiro
authors.initials: T
authors.lastname: Ito
authors.affiliation: Kosuke Takagaki, Tatsuhiro Ito, Moriya Iwaizumi, Yasushi Hamaya, Ken Sugimoto, First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan.
authors.forename: Moriya
authors.initials: M
authors.lastname: Iwaizumi
authors.affiliation: Kosuke Takagaki, Tatsuhiro Ito, Moriya Iwaizumi, Yasushi Hamaya, Ken Sugimoto, First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Hamaya
authors.affiliation: Kosuke Takagaki, Tatsuhiro Ito, Moriya Iwaizumi, Yasushi Hamaya, Ken Sugimoto, First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan.
authors.forename: Hiroe
authors.initials: H
authors.lastname: Tsukui
authors.affiliation: Kosuke Takagaki, Tatsuhiro Ito, Moriya Iwaizumi, Yasushi Hamaya, Ken Sugimoto, First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan.
authors.forename: Takahisa
authors.initials: T
authors.lastname: Furuta
authors.affiliation: Kosuke Takagaki, Tatsuhiro Ito, Moriya Iwaizumi, Yasushi Hamaya, Ken Sugimoto, First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan.
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Wada
authors.affiliation: Kosuke Takagaki, Tatsuhiro Ito, Moriya Iwaizumi, Yasushi Hamaya, Ken Sugimoto, First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Baba
authors.affiliation: Kosuke Takagaki, Tatsuhiro Ito, Moriya Iwaizumi, Yasushi Hamaya, Ken Sugimoto, First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Sugimoto
mesh_terms: D058582:Double-Balloon Enteroscopy / Q000379:methods*; D006801:Humans; D010535:Laparoscopy; D008297:Male; D008467:Meckel Diverticulum / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
keywords: Double-balloon enteroscopy; Epigastric pain; Heterotopic gastric mucosa; Inverted Meckel’s diverticulum; Small bowel tumor