definition of dilation of bile duct
Bile ducts from the liver and the gallbladder join together to form the common bile duct. This duct drains into the small bowel and delivers bile to this portion of the small bowel known as the duodenum. Bile helps in the breakdown of undigested food and also gives color to bowel motions. Whenever a blockage occurs in the bile duct, the bile ducts become enlarged or dilated.