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Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction
Published on: March 25, 2022
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Risk Factors for Cholecystitis After Self-expandable Metallic Stent Placement for Malignant Distal Biliary
Hashem Albunni1, Azizullah Beran2, Nwal Hadaki2
1Department of Internal Medicine, Indiana University School of Medicine.
Journal of Clinical Gastroenterology
|March 10, 2025
Summary
This study identified key risk factors for cholecystitis after self-expandable metallic stent (SEMS) placement in malignant distal biliary obstruction. Tumor involvement of the cystic duct and stent placement across its orifice are significant predictors.
Area of Science:
- Gastroenterology
- Interventional Endoscopy
- Oncology
Background:
- Endoscopic biliary stenting, particularly with self-expandable metallic stents (SEMS), is crucial for managing unresectable malignant distal biliary obstruction (MDBO).
- Cholecystitis is a potential complication of SEMS placement, arising from cystic duct obstruction.
- Identifying risk factors for cholecystitis is essential for improving patient outcomes and procedural safety.
Purpose of the Study:
- To conduct a meta-analysis to identify and quantify risk factors for cholecystitis following SEMS placement in patients with MDBO.
- To provide evidence-based insights for predicting and potentially mitigating cholecystitis risk in this patient population.
Main Methods:
- A comprehensive literature search was performed to identify relevant published studies.
- Included studies were retrospective cohort studies utilizing multivariate models to assess risk factors.
- Pooled adjusted odds ratios (OR) with 95% confidence intervals (CIs) were calculated.
Main Results:
- Eleven studies involving 4291 patients were analyzed, examining eight risk factors.
- Significant predictors of cholecystitis included tumor involvement of the cystic duct take-off (OR 5.61), SEMS placement across the cystic duct orifice (OR 1.97), presence of gallstones (OR 2.56), contrast flow into the gallbladder (OR 3.91), and use of covered SEMS (OR 2.77).
- Prior biliary drainage, tumor invasion to the feeding artery, and stent length ≤60 mm were not associated with increased cholecystitis risk.
Conclusions:
- This meta-analysis reliably identified key adjusted risk factors for cholecystitis after SEMS placement for MDBO.
- Findings can inform the development of prediction models to identify patients at higher risk of developing cholecystitis.
- Improved risk stratification may lead to more personalized management strategies and reduced complication rates.
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