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Health A-Z

Medical Content Created by the Faculty of the
Harvard Medical School

What Is It?

The gallbladder is a small, pear-shaped pouch that lies beneath the liver, in the upper abdomen. It stores bile. This fluid, produced by the liver, helps digest fat. The gallbladder releases bile into the small intestine through the bile duct. This thin tube connects the liver and gallbladder to the small intestine. Cancer develops when abnormal cells in these structures multiply and grow rapidly.

Most gallbladder and bile duct cancers are adenocarcinomasócancers of cells that line the glands and ducts. Bile duct adenocarcinoma forms from the mucus glands that line the duct. It can develop in any part of the bile duct.

Gallbladder and bile duct cancers are rare. Gallbladder cancer is more common in women than in men. People with gallstones have a slightly higher risk of developing gallbladder and bile duct cancer. These cancers also have been linked to infections with the liver fluke parasite. They have also been tied to sclerosing cholangitis, ulcerative colitis, and cirrhosis. These diseases can cause inflammation and scarring of the bile duct, colon, or liver.

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From Health A-Z, Harvard Health Publications. Copyright 2007 by the President and Fellows of Harvard College. All rights reserved. Written permission is required to reproduce, in any manner, in whole or in part, the material contained herein. To make a reprint request, contact Harvard Health Publications. Used with permission of StayWell.

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