Definition of gallbladder cancer: Cancer that forms in tissues of the gallbladder. The gallbladder is a pear-shaped organ below the liver that collects and stores bile (a fluid made by the liver to digest fat). Gallbladder cancer begins in the innermost layer of tissue and spreads through the outer layers as it grows.
Estimated new cases and deaths from gallbladder (and other biliary) cancer in the United States in 2014:
- New cases: 10,650
- Deaths: 3,630