EYEMAX® Versus SPYGLASS™ DS for Biliary Stricture Diagnosis

Cholangiocarcinoma remains difficult to diagnose because of the limited sensitivity of currently available endobiliary sampling techniques. Cholangioscopy-guided biopsies performed with the SPYGLASS™ DS system have improved tissue acquisition compared with conventional brushing techniques, but diagnostic sensitivity remains suboptimal, partly because of the small diameter of the dedicated biopsy forceps. The EYEMAX® cholangioscopy system has a larger working channel, potentially allowing the use of larger biopsy forceps and improved tissue acquisition. This multicenter randomized study aims to compare the diagnostic performance of EYEMAX® versus SPYGLASS™ DS for the diagnosis of malignant biliary strictures. The primary objective is to compare the positive diagnostic yield of the first four cholangioscopy-guided biopsies obtained with each system in patients with adenocarcinomatous biliary strictures.