title: Fistula formation to the bladder and to a corpus alienum as a rare complication of diverticulitis: a case report.
abstract: BACKGROUND
  Fistula formation is a known complication of diverticulitis. Treatment of a diverticular fistula depends on the comorbidity of the patient and the severity of the disease.
  
  
  METHODS
  A 59-year-old man presented to the Emergency Department with chronic lower back pain that was being treated with a neurostimulator. He presented with severe sepsis, and an abscess formation near the neurostimulator. An abdominal and pelvic computed tomography scan revealed diverticulitis complicated by fistula formation to the neurostimulator and bladder. He was successfully treated by a two-stage procedure: first, exploration and drainage of the abscess, with removal of the foreign body, followed by a sigmoid resection 1 week later.
  
  
  CONCLUSIONS
  In rare but severe presentations of diverticular disease, it is very important to limit initial treatment to the most threatening disorder.
authors.affiliation: Department of Surgery, Erasmus Medical Center, Rotterdam, The Netherlands.
authors.forename: Jefrey
authors.initials: J
authors.lastname: Vermeulen
authors.forename: Naomi
authors.initials: N
authors.lastname: van Hout
authors.forename: Rene
authors.initials: R
authors.lastname: Klaasen
mesh_terms: D034861:Abdominal Wall; D000038:Abscess / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D020878:Device Removal; D004238:Diverticulitis / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D004322:Drainage; D006801:Humans; D058542:Implantable Neurostimulators; D007412:Intestinal Fistula / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012810:Sigmoid Diseases / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D001747:Urinary Bladder Fistula / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery