Endoscopic Ultrasound-Guided Biliary Drainage of First Intent With a Lumen-Apposing Metal Stent vs Endoscopic Retrograde Cholangiopancreatography in Malignant Distal Biliary Obstruction: A Multicenter Randomized Controlled Study (ELEMENT Trial)

Gastroenterology. 2023 Nov;165(5):1249-1261.e5. doi: 10.1053/j.gastro.2023.07.024. Epub 2023 Aug 6.

Abstract

Background & aims: Endoscopic ultrasound-guided choledochoduodenostomy with a lumen-apposing metal stent (EUS-CDS) is a promising modality for management of malignant distal biliary obstruction (MDBO) with potential for better stent patency. We compared its outcomes with endoscopic retrograde cholangiopancreatography with metal stenting (ERCP-M).

Methods: In this multicenter randomized controlled trial, we recruited patients with MDBO secondary to borderline resectable, locally advanced, or unresectable peri-ampullary cancers across 10 Canadian institutions and 1 French institution. This was a superiority trial with a noninferiority assessment of technical success. Patients were randomized to EUS-CDS or ERCP-M. The primary end point was the rate of stent dysfunction at 1 year, considering competing risks of death, clinical failure, and surgical resection. Analyses were performed according to intention-to-treat principles.

Results: From February 2019 to February 2022, 144 patients were recruited; 73 were randomized to EUS-CDS and 71 were randomized to ERCP-M. The mean (SD) procedure time was 14.0 (11.4) minutes for EUS-CDS and 23.1 (15.6) minutes for ERCP-M (P < .01); 40% of the former was performed without fluoroscopy. Technical success was achieved in 90.4% (95% CI, 81.5% to 95.3%) of EUS-CDS and 83.1% (95% CI, 72.7% to 90.1%) of ERCP-M with a risk difference of 7.3% (95% CI, -4.0% to 18.8%) indicating noninferiority. Stent dysfunction occurred in 9.6% vs 9.9% of EUS-CDS and ERCP-M cases, respectively (P = .96). No differences in adverse events, pancreaticoduodenectomy and oncologic outcomes, or quality of life were noted.

Conclusions: Although not superior in stent function, EUS-CDS is an efficient and safe alternative to ERCP-M in patients with MDBO. These findings provide evidence for greater adoption of EUS-CDS in clinical practice as a complementary and exchangeable first-line modality to ERCP in patients with MDBO.

Clinicaltrials: gov, Number: NCT03870386.

Keywords: Biliary Obstruction; ERCP; Endoscopic Ultrasonography; Pancreatic Cancer; Stent.

Publication types

  • Comparative Study
  • Multicenter Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Cholangiopancreatography, Endoscopic Retrograde* / adverse effects
  • Cholangiopancreatography, Endoscopic Retrograde* / instrumentation
  • Choledochostomy / adverse effects
  • Choledochostomy / instrumentation
  • Choledochostomy / methods
  • Cholestasis* / diagnostic imaging
  • Cholestasis* / etiology
  • Cholestasis* / surgery
  • Cholestasis* / therapy
  • Drainage* / adverse effects
  • Drainage* / instrumentation
  • Drainage* / methods
  • Endosonography*
  • Female
  • Humans
  • Male
  • Metals
  • Middle Aged
  • Stents*
  • Treatment Outcome
  • Ultrasonography, Interventional / adverse effects

Substances

  • Metals

Associated data

  • ClinicalTrials.gov/NCT03870386