Highlights of advances in pancreaticobiliary disease interventions were reviewed at this year’s Digestive Disease Week (DDW) as part of the American Gastroenterological Association (AGA) postgraduate course.
(Michigan Medicine)
Dr. Allison Schulman
Over the last several decades, the endoscopic treatment of pancreaticobiliary disease has advanced exponentially. Evidence-based advances are changing the landscape of pancreaticobiliary disease management.
While endoscopic retrograde cholangiopancreatography (ERCP) with transpapillary stent placement is first-line for the treatment of biliary obstruction, endoscopic ultrasound (EUS)-guided biliary drainage has emerged as an effective alternative in cases of failed ERCP. These procedures can be performed via a transhepatic approach (hepaticogastrostomy) from the proximal stomach, an extrahepatic approach (choledochoduodenostomy) from the duodenum, or via the gallbladder. Numerous studies have proved the safety and efficacy of these interventions in malignant biliary obstruction. A recent systematic meta-analysis pooled all of these approaches and concluded that EUS-guided biliary drainage is also reasonable to offer in benign disease when ERCP has failed or is not technically possible.
EUS-guided gallbladder drainage is similarly emerging as an alternative approach for management of acute cholecystitis. This is a reasonable option in patients with acute cholecystitis who are poor surgical candidates, have no evidence of gallbladder perforation, and will tolerate sedation. Moreover, this approach may be preferred over ERCP with cystic duct stent placement in the setting of a large stone burden, gastric outlet obstruction, or when an indwelling metal biliary stent occludes the cystic duct. Multidisciplinary discussion with surgical and interventional radiology services is essential, especially given this technique may preclude future cholecystectomy.
Indeterminate biliary strictures historically pose a major diagnostic challenge, and current approaches in the evaluation of such strictures lack diagnostic sensitivity. ERCP with concurrent brushing of the bile duct for cytology remains the most commonly used method of acquiring tissue. However, the sensitivity of diagnosis on brush cytology remains frustratingly low. Recent compelling evidence for increasing the number of brush passes to 30 in an indeterminate stricture improves diagnostic sensitivity and is a simple, safe, and low-cost intervention. This approach may ultimately decrease the number of patients requiring surgical intervention, which is particularly important when up to one-fifth of suspected biliary malignancies are found to be benign after surgical resection.
Not only have studies addressed increasing the diagnostic yield of stricture evaluation, but the treatment of biliary strictures has also evolved. Various stents are available, and different practice patterns have emerged for management of this entity. In an updated meta-analysis of randomized controlled trials evaluating multiple plastic stents versus a single covered metal stent for benign biliary strictures, no difference was found in stricture resolution, stricture recurrence, stent migration or adverse events. However, those patients treated with covered metal stents required fewer sessions of ERCP for stricture resolution. Moreover, no difference in stricture resolution was seen in subgroup analysis between anastomotic strictures, chronic pancreatitis, or bile duct injury. Despite higher cost of the stent itself, covered metal stents may ultimately lead to an overall decrease in health care expenditure.
The above examples are only a small subset of the progress that has been made in endoscopic management of pancreaticobiliary disease. The armamentarium of tools and techniques will continue to evolve to help us provide better minimally invasive care for our patients.
Dr. Schulman is associate professor in the division of gastroenterology and hepatology and the department of surgery at the University of Michigan. She is the incoming chief of endoscopy and the director of bariatric endoscopy. She disclosed consultancy work with Apollo Endosurgery, Boston Scientific, Olympus and MicroTech. She also disclosed research and grant support from GI Dynamics and Fractyl.
