Cancer of the bile ducts (cholangiocarcinoma) can originate anywhere along the biliary tract, particularly outside of the liver to where it enters the small intestine. It can complicate primary sclerosing cholangitis (see see Primary Sclerosing Cholangitis).
Cancer of the gallbladder is rare. Nearly everyone with gallbladder cancer has gallstones. Many people live only a few months after this cancer develops.
Polyps, which are noncancerous (benign) outgrowths of tissue, may develop in the gallbladder. They rarely cause symptoms or require treatment. They are found in about 5% of people during ultrasonography.
Sometimes cancers can block the flow of bile, but most blockages are caused by gallstones. Even less often, cancer can spread (metastasize) from elsewhere in the body to adjacent structures or nearby lymph nodes, causing blockage. Noncancerous tumors in bile ducts also cause blockages.
Early symptoms include the following:
Symptoms gradually worsen. Abdominal pain may become severe and constant. It is usually caused by blockage of the bile ducts. People feel tired and uncomfortable. They may feel a mass in their abdomen.
Doctors suspect bile duct cancer when no other cause of a bile duct blockage is identified, especially in people with primary sclerosing cholangitis. Ultrasonography is the first test to check for a tumor in the bile ducts. Magnetic resonance cholangiopancreatography (MRCP) or computed tomography (CT) may be done instead (see see Imaging Tests).
If a tumor is found, doctors take a tissue sample by inserting a thin needle through the skin. Ultrasonography or CT is used to guide the needle. Endoscopic retrograde cholangiopancreatography (ERCP), using a flexible viewing tube inserted through the mouth and into the small intestine, may also be used to obtain images and a tissue sample (see see Understanding Endoscopic Retrograde Cholangiopancreatography).
If gallbladder cancer is suspected, CT is usually done. It provides more information than ultrasonography.
Most bile duct and gallbladder cancers are fatal, but treatment can help control symptoms.
Tubes (stents) inserted into a duct allows bile to flow past the blockage. This procedure helps control pain and relieves itchiness. Blockages can be opened during ERCP.
Surgery to remove a cancerous tumor may be done, but usually the tumor cannot be completely removed. Chemotherapy and radiation therapy for cholangiocarcinoma are being studied. If tumors have spread from other parts of the body (metastasized), chemotherapy may provide some symptom relief but does not dramatically improve survival.
Very early gallbladder cancer that is found during surgery for gallstones can often be cured by removing the gallbladder.
Last full review/revision December 2007 by Eldon A. Shaffer, MD