Abdominal imaging

Ultrasound of the liver and biliary tree is often used as the initial imaging modality in patients with suspected obstructive jaundice.^[40][41] Ultrasound can identify obstruction and ductal dilatation and, in some cases, may be sufficient to diagnose cholangiocarcinoma.^[42] Computed tomography (CT) scanning may also play an important role in the diagnosis of cholangiocarcinoma.^[43][44][45]