title: Ileo-ileal knot: a rare case of acute strangulated intestinal obstruction.
abstract: Strangulated intestinal obstruction is one of the most common types of acute abdomen and requires urgent surgical treatment. Herein, we report a very rare case of strangulated intestinal obstruction caused by an ileo-ileal knot. An 80-year-old woman was admitted to our hospital with suspicion of strangulation ileus and underwent emergency laparotomy after investigation by exploratory single-port laparoscopy. During surgery, a small bowel gangrene caused by an ileo-ileal knot was found. The gangrenous segment was resected, and primary anastomosis was performed. Post-operative recovery was uneventful except for a minor wound infection. Our extensive search of the literature found only 7 case reports of ileo-ileal knot including ours. An ileo-ileal knot should be considered in the differential diagnosis of acute intestinal obstruction, because this rare phenomenon requires urgent surgical treatment; and some complications should be considered during or after surgery.
authors.affiliation: Department of Emergency Medicine, Osaka Medical College, Takatsuki, Japan ; Department of General and Gastroenterological Surgery, Osaka Medical College, Takatsuki, Japan.
authors.forename: Kohei
authors.initials: K
authors.lastname: Taniguchi
authors.affiliation: Department of Emergency Medicine, Osaka Medical College, Takatsuki, Japan ; Department of General and Gastroenterological Surgery, Osaka Medical College, Takatsuki, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Iida
authors.affiliation: Department of Emergency Medicine, Osaka Medical College, Takatsuki, Japan.
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Watanabe
authors.affiliation: Department of Emergency Medicine, Osaka Medical College, Takatsuki, Japan.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Nitta
authors.affiliation: Department of Emergency Medicine, Osaka Medical College, Takatsuki, Japan.
authors.forename: Masao
authors.initials: M
authors.lastname: Tomioka
authors.affiliation: Department of General and Gastroenterological Surgery, Osaka Medical College, Takatsuki, Japan.
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Uchiyama
authors.affiliation: Department of Emergency Medicine, Osaka Medical College, Takatsuki, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Takasu
mesh_terms: D000369:Aged, 80 and over; D005260:Female; D005734:Gangrene / Q000175:diagnosis / Q000209:etiology; D006801:Humans; D007077:Ileal Diseases / Q000175:diagnosis / Q000209:etiology; D007415:Intestinal Obstruction / Q000175:diagnosis* / Q000209:etiology
keywords: acute abdomen; gangrene; ileo-ileal knot; ileo-ileal knotting; intestinal obstruction