bile duct dilation
Abnormal enlargement of the biliary tree, often indicating downstream obstruction.
Full Definition
Bile duct dilation refers to abnormal enlargement of the intrahepatic or extrahepatic biliary system, typically indicating mechanical obstruction or functional impairment of bile flow. The dilation pattern can help localize the site of obstruction, with intrahepatic dilation suggesting distal obstruction and isolated extrahepatic dilation pointing to more proximal causes. Common etiologies include choledocholithiasis, malignant strictures, benign strictures, and sphincter of Oddi dysfunction. The degree and extent of dilation, along with clinical presentation, guide further diagnostic and therapeutic interventions.
Usage
Usage note: Should be described with location and severity in imaging reports.
In Context
- "MRCP demonstrated moderate intrahepatic bile duct dilation with a transition point at the hilum." — Radiology report
- "The patient's bile duct dilation resolved following successful stone extraction via ERCP." — Follow-up imaging report