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The bile duct is some 6–8 cm long, and normally up to 8 mm in diameter. [4]Its proximal supraduodenal part is situated within the free edge of the lesser omentum.Its middle retroduodenal part is oriented inferiorly and right-ward, and is situated posterior to the first part of the duodenum, and anterior to the inferior vena cava.
Cholangiocarcinoma, also known as bile duct cancer, is a type of cancer that forms in the bile ducts. [2] Symptoms of cholangiocarcinoma may include abdominal pain, yellowish skin, weight loss, generalized itching, and fever. [1] Light colored stool or dark urine may also occur. [4]
Type IVb: Multiple dilatations involving only the extrahepatic bile ducts. Type V: Cystic dilatation of intrahepatic biliary ducts without extrahepatic duct disease. The presence of multiple saccular or cystic dilations of the intrahepatic ducts is known as Caroli's disease. [4] Type VI: An isolated cyst of the cystic duct is an extremely rare ...
Ultrasound may show dilation of the bile duct and identifies 38% of bile duct stones; it is relatively poor at identifying stones farther down the bile duct. Ultrasound can help distinguish between cholangitis and cholecystitis (inflammation of the gallbladder), which has similar symptoms to cholangitis but appears differently on ultrasound. [14]
The first symptoms typically include fever, intermittent abdominal pain, and an enlarged liver.Occasionally, yellow discoloration of the skin occurs. [4] Caroli disease usually occurs in the presence of other diseases, such as autosomal recessive polycystic kidney disease, cholangitis, gallstones, biliary abscess, sepsis, liver cirrhosis, kidney failure, and cholangiocarcinoma (7% affected). [2]
Spontaneous biliary enteric fistula (e.g. gallstone ileus) Infection by gas-forming organisms (e.g. emphysematous cholangitis) Congenital abnormalities; Other rare causes that have been reported include duodenal diverticulum, paraduodenal abscess, operative trauma, and carcinoma of the duodenum, stomach and bile duct. [1] [2]
A surgically created passage between the common bile duct and the jejunum in a procedure called a choledochojejunostomy, can be carried out to relieve the symptoms of biliary obstruction as well as allows the bile duct to drain. [5] In infants with biliary atresia, hepatoportoenterostomy is an alternative method of providing bile drainage.
The bile duct scarring that occurs in PSC narrows the ducts of the biliary tree and impedes the flow of bile to the intestines. Eventually, it can lead to cirrhosis of the liver and liver failure . PSC increases the risk of various cancers, including liver cancer , gallbladder carcinoma , colorectal cancer , and cholangiocarcinoma .