By eHow Health Editor
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The gallbladder is a small, pear-shaped organ that sits underneath a section of the liver. The gallbladder concentrates and stores bile, which is used in the digestive process. This organ can acquire 1 of 2 varieties of cancerous tumors: adenocarcinomas or papillary tumors. Both forms of gallbladder cancer are diagnosed by 1 of several available tests, and there are key symptoms to learn about and watch for in order to detect the early stages of this disease.
eHow Health Editor