Endoscopic ultrasound effectively diagnoses unexplained bile duct dilation.

Endoscopic ultrasound (EUS) demonstrated significant diagnostic yield for patients with unexplained common bile duct (CBD) dilation, particularly among those with negative prior imaging. In a cohort of 109 patients, 41 tested positive for various conditions, including choledocholithiasis and chronic pancreatitis. Factors such as older age and symptoms like jaundice increased the likelihood of positive findings. EUS proved a useful tool even after negative magnetic resonance cholangiopancreatography, highlighting its role in managing CBD issues.