title: Biodegradable esophageal stents in benign and malignant strictures - a single center experience.
abstract: OBJECTIVE
  Biodegradable (BD) esophageal stents were recently developed mainly for refractory benign strictures, but experience and available literature are limited.
  
  
  METHODS
  This was a retrospective observational study. All patients who had BD stents inserted due to refractory benign esophageal strictures or malignant strictures, or were awaiting radical radiotherapy/chemotherapy or neo-adjuvant therapy and esophagectomy between March 2011 and July 2015 were included.
  
  
  RESULTS
  Stent placement was successful in all patients. Ten patients with benign strictures (3 male, median age 80.5 years, IQR: 68.75 - 89.5) were followed-up for a median of 171.5 weeks (IQR: 24 - 177.25). The interval between dilatations prior to the first BD stent placement (median: 34.25 days, IQR: 23.06 - 48.29) was significantly shorter than the interval between the first BD stent placement and the first intervention required (median: 149.5 days, IQR: 94.25 - 209.5) and this difference was statistically significant (P = 0.012). Ten patients with esophageal cancer (8 male, median age: 69 years, IQR: 59.25 - 80.75) were included and they were followed up for a median of 36 weeks (IQR: 26 - 58). Only 1 completed radical radiotherapy successfully, but developed refractory post-radiotherapy stricture. No one proceeded to esophagectomy and 50 % required a self-expanding metal stent (SEMS) at a median of 134 days (IQR: 100 - 263) following stent placement.
  
  
  CONCLUSIONS
  BD stents were successfully deployed in both benign and malignant strictures. They offered a prolonged dilatation-free interval in benign strictures, yet in the majority of patients, strictures recurred. In malignant strictures, stent patency was similar to that of benign strictures, which suggests a potential value in ensuring adequate oral intake during oncologic therapy. In our cohort, however, use of stents did not contribute to improved outcome.
authors.affiliation: Centre for Liver & Digestive Disorders, The Royal Infirmary, University of Edinburgh, Edinburgh, Scotland, UK.
authors.forename: Dimitrios E
authors.initials: DE
authors.lastname: Sigounas
authors.affiliation: Centre for Liver & Digestive Disorders, The Royal Infirmary, University of Edinburgh, Edinburgh, Scotland, UK.
authors.forename: Sandeep
authors.initials: S
authors.lastname: Siddhi
authors.affiliation: Centre for Liver & Digestive Disorders, The Royal Infirmary, University of Edinburgh, Edinburgh, Scotland, UK.
authors.forename: John N
authors.initials: JN
authors.lastname: Plevris