title: Internal rectal intussusception--fact or fancy?
abstract: OBJECTIVE
  There is still considerable debate whether internal intussusception represents a functional disorder. We have reviewed our results in an effort to define its symptomatology and to assess defecography.
  
  
  METHODS
  Rectopexy has been performed for internal intussusception in 37 patients. Eighteen had solitary rectal ulcer syndrome (SRUS), and 31 had anterior rectal wall prolapse. Defecography demonstrated anterior wall prolapse in 13, circular prolapse in 21, and no disorders in 3 patients. Pelvic floor function was normal. Follow-up varied from one to nine years.
  
  
  RESULTS
  Twenty-six patients became asymptomatic. Anterior wall prolapses could not be palpated anymore. All SRUS lesions healed. Patients with SRUS (P < 0.001) or circular prolapse (P < 0.001) became significantly more asymptomatic. Results in patients with anterior rectal wall prolapse were significantly worse (P < 0.001).
  
  
  CONCLUSIONS
  Internal intussusception is a distinct functional rectal disorder. Its symptomatology and findings during physical examination are aspecific. Characteristic defecographic features and presence of SRUS are indications for surgery, provided pelvic floor function during straining is normal.
authors.affiliation: Department of Surgery, Groot Ziekengasthuis, Den Bosch, The Netherlands.
authors.forename: W F
authors.initials: WF
authors.lastname: van Tets
authors.forename: J H
authors.initials: JH
authors.lastname: Kuijpers
mesh_terms: D006801:Humans; D007443:Intussusception / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology*; D011859:Radiography; D012002:Rectal Diseases / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology*; D012005:Rectal Prolapse / Q000473:pathology; D012189:Retrospective Studies; D014456:Ulcer