Related Experiment Video
Updated: Aug 8, 2026
Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction
Published on: March 25, 2022
Endoscopic Transmural Drainage of Walled-off Necrosis: Comparative Outcomes of EUS-guided Versus Conventional
Bülent Ödemiş1, Nazmi Gökhan Ünver1, Mustafa Özdemir2
1Department of Gastroenterology.
Background:
Walled-off necrosis (WON) is a complex sequela of acute pancreatitis that often necessitates interventional management. Endoscopic transmural drainage has emerged as the preferred first-line approach, especially with the increasing availability of endoscopic ultrasonography (EUS) guidance. This study aimed to evaluate endoscopic management of WON and identify factors associated with technical and clinical success.
Methods:
Patients who underwent endoscopic transmural drainage for symptomatic WON were analyzed retrospectively. Two different techniques-conventional and EUS-guided-were used as endoscopic drainage modalities. Baseline characteristics, procedural details, and outcomes were collected, and the impact of drainage modality and anatomic factors-including paracolic extension, disconnected pancreatic duct syndrome (DPDS), and colonic fistula-on clinical outcomes and adverse events was analyzed.
Results:
A total of 73 patients (mean age: 54.6±13.9 y; 46.6% male) underwent a total of 76 transmural drainage procedures. The median size of WON collections was 14 cm (IQR: 11-17 cm), and the most common indication was infection (62.5%). Colonic fistula and DPDS were identified in 5 (6.8%) and 38 (52.1%) patients, respectively. Technical success was assessed per procedure. Overall technical success was 97.4% (74/76), with 100% (36/36) success in the conventional group and 95.0% (38/40) in the EUS group. Clinical success was achieved in 84.9% (62/73) of patients, with similar outcomes between conventional (83.3%) and EUS-guided (86.5%) drainage (P=0.961). Reintervention was required in 67.1%, and direct endoscopic necrosectomy was performed in 31.5%. Complications occurred in 28.7% of patients, most commonly bleeding (15.1%), generally managed endoscopically.
Conclusions:
Endoscopic transmural drainage is an effective and safe intervention for the management of WON, with high technical and clinical success. EUS-guided drainage offers significant advantages by allowing intervention in patients without luminal bulging and in those with smaller collections, thereby expanding treatment eligibility to a broader patient population.
