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Abdominal ultrasonography (with Doppler) of dilated intrahepatic bile ducts, in this case because of pancreatic cancer. The bile ducts are colorless (black) in contrast to blood vessels (portal vein near center, and hepatic artery to the right of it) which have Doppler signal.
When the intrahepatic bile duct wall has protrusions, it is clearly seen as central dots or a linear streak. [10] Caroli disease is commonly diagnosed after this “central dot sign” is detected on a CT scan or ultrasound. [10] However, cholangiography is the best, and final, approach to show the enlarged bile ducts as a result of Caroli ...
Classification was based on site of the cyst or dilatation. Type I to IV has been subtyped. Type I: Most common variety (80-90%) involving saccular or fusiform dilatation of a portion or entire common bile duct (CBD) with normal intrahepatic duct. Type II: These cysts are present as an isolated diverticulum protruding from the CBD.
Ultrasound of the liver and biliary tree is often used as the initial imaging modality in people with suspected obstructive jaundice. [49] [50] Ultrasound can identify obstruction and ductal dilatation and, in some cases, may be sufficient to diagnose cholangiocarcinoma. [51]
The name biliary tract is used to refer to all of the ducts, structures and organs involved in the production, storage and secretion of bile. [10] The tract is as follows: Bile canaliculi >> Canals of Hering >> intrahepatic bile ductule (in portal tracts / triads) >> interlobular bile ducts >> left and right hepatic ducts [4]
Pneumobilia is the presence of gas in the biliary system.It is typically detected by ultrasound or a radiographic imaging exam, such as CT, or MRI.It is a common finding in patients that have recently undergone biliary surgery or endoscopic biliary procedure.
In patients with deranged liver function tests, ultrasound may show increased liver size (hepatomegaly), increased reflectiveness (which might, for example, indicate cholestasis), gallbladder or bile duct diseases, or a tumor in the liver. Ultrasonography of liver tumors involves two stages: detection and characterization.
Jaundice is commonly caused by conditions such as pancreatic cancer, which causes blockage of the bile duct passing through the cancerous portion of the pancreas; cholangiocarcinoma, cancer of the bile ducts; blockage by a stone in patients with gallstones; and from scarring after injury to the bile duct during gallbladder removal.