Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Esophageal Cancer ?
    ### Response:
    The esophagus is a hollow tube that carries food and liquids from your throat to your stomach. Early esophageal cancer usually does not cause symptoms. Later, you may have symptoms such as       - Painful or difficult swallowing    - Weight loss    - A hoarse voice or cough that doesn't go away       You're at greater risk for getting esophageal cancer if you smoke, drink heavily, or have acid reflux.
    