Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Gallbladder Cancer ?
    ### Response:
    Your gallbladder is a pear-shaped organ under your liver. It stores bile, a fluid made by your liver to digest fat. As your stomach and intestines digest food, your gallbladder releases bile through a tube called the common bile duct. The duct connects your gallbladder and liver to your small intestine.
    