Bile is a fluid that helps break down fat in food during digestion. It is transported to liver through small tubes, called bile ducts. This thin tube also connects the liver and gallbladder to the small intestine.
Most bile duct cancers are adenocarcinomas or cancers of cells that line the glands and ducts.
Bile duct cancers are rare. However, people with gallstones have a slightly higher risk of developing bile duct cancer. Also, being older or having primary sclerosing cholangitis; a condition that leads to scarring and narrowing of bile ducts, ulcerative colitis, and cirrhosis increases the risk of developing the bile duct cancer.