title: Benign biliary obstruction: is treatment with the Wallstent advisable?
abstract: OBJECTIVE
  To evaluate the effectiveness of the self-expanding Wallstent in the treatment of benign biliary strictures.
  
  
  METHODS
  Twenty patients with benign biliary strictures were included in this retrospective study. Seven patients had chronic pancreatitis, two had fibrous papillary stenosis, one had primary sclerosing cholangitis, and 10 had postsurgical strictures, including four who had a stenosed bilidigestive anastomosis. Primary and secondary patency of the stents and clinical outcome after stent insertion were evaluated.
  
  
  RESULTS
  Stent placement was successful in all patients. At the end of the observation period, which lasted 3-78 months (mean, 31.2 months +/- 4.5 [standard error]), 10 patients were alive. Median primary patency was 32 months +/- 8.7. In 10 patients, patency was preserved during the observation period (two with secondary patency). Six patients had a good clinical result. Among the other four patients, one had recurrent cholangitis, one had a biliary abscess, and two had stent revisions. In the other patients, stents became occluded after 3-55 months. The reason for stent occlusion was a stone in one patient; in the others, the causes were not proved.
  
  
  CONCLUSIONS
  Results of stent placement for treatment of benign biliary strictures are not encouraging. However, the patient population is too limited to allow final conclusions.
authors.affiliation: Department of Radiology, Karl-Franzens University, Graz, Austria.
authors.forename: K A
authors.initials: KA
authors.lastname: Hausegger
authors.forename: C
authors.initials: C
authors.lastname: Kugler
authors.forename: M
authors.initials: M
authors.lastname: Uggowitzer
authors.forename: J
authors.initials: J
authors.lastname: Lammer
authors.forename: R
authors.initials: R
authors.lastname: Karaic
authors.forename: G E
authors.initials: GE
authors.lastname: Klein
authors.forename: M
authors.initials: M
authors.lastname: Maurer
mesh_terms: D002779:Cholestasis / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000628:therapy*; D003137:Common Bile Duct Diseases / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000628:therapy*; D004867:Equipment Design; D005069:Evaluation Studies as Topic; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015993:Life Tables; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D015607:Stents; D013997:Time Factors; D016896:Treatment Outcome