Ultrasound inside the body reveals how tumors block the bile duct

This study uses endoscopic ultrasound—a tiny ultrasound probe on a flexible tube passed through the mouth—to measure the size of the common bile duct in people with jaundice caused by pancreatic or bile duct tumors. Researchers aim to better understand how these tumors compress the bile duct, which may help guide future diagnosis and treatment. The study involves 20 adults with jaundice and high bilirubin levels who are already scheduled for an endoscopic ultrasound for biopsy or staging.