title: Adult intussusception: presentation, management, and outcomes of 148 patients.
abstract: BACKGROUND
  Intussusception is a predominantly pediatric diagnosis that is not well characterized among adults. Undiagnosed cases can result in significant morbidity, making early recognition important for clinicians.
  
  
  OBJECTIVE
  We describe the presentation, clinical management, disposition, and outcome of adult patients diagnosed with intussusception during a 13-year period.
  
  
  METHODS
  A retrospective study of consecutive adult patients diagnosed with intussusception at a tertiary academic center was carried out from 1996 to 2008. Cases were identified using International Classification of Diseases, 9(th) Revision codes and a document search engine. Data were abstracted in duplicate by two independent authors.
  
  
  RESULTS
  Among 148 patients included in the study, the most common symptoms at presentation were abdominal pain (72%), nausea (49%), and vomiting (36%). Twenty percent were asymptomatic. Sixty percent of cases had an identifiable lead point. Patients presenting to the emergency department (ED) (31%) had higher rates of abdominal pain (relative risk [RR] 5.7) and vomiting (RR 3.4), and were more likely to undergo surgical intervention (RR 1.8) than patients diagnosed elsewhere. There were 77 patients who underwent surgery within 1 month; patients presenting with abdominal pain (RR 2.2), nausea (RR 1.7), vomiting (RR 1.4), and bloody stool (RR 1.9) were more likely to undergo surgery.
  
  
  CONCLUSIONS
  Adult intussusception commonly presents with abdominal pain, nausea, and vomiting; however, approximately 20% of cases are asymptomatic and seem to be diagnosed by incidental radiologic findings. Patients presenting to an ED with intussusception due to a mass as a lead point or in an ileocolonic location are likely to undergo surgical intervention.
authors.affiliation: Mayo Medical School, Mayo Clinic College of Medicine, Rochester, Minnesota, USA.
authors.forename: Rachel A
authors.initials: RA
authors.lastname: Lindor
authors.forename: M Fernanda
authors.initials: MF
authors.lastname: Bellolio
authors.forename: Annie T
authors.initials: AT
authors.lastname: Sadosty
authors.forename: Frank
authors.initials: F
authors.lastname: Earnest
authors.forename: Daniel
authors.initials: D
authors.lastname: Cabrera
mesh_terms: D015746:Abdominal Pain / Q000209:etiology; D000328:Adult; D000368:Aged; D058070:Asymptomatic Diseases; D003108:Colonic Diseases / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D007077:Ileal Diseases / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D033162:Incidental Findings; D007443:Intussusception / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009325:Nausea / Q000209:etiology; D012007:Rectum; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014839:Vomiting / Q000209:etiology