Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Colorectal Cancer ?
    ### Response:
    Most cancers in their early, most treatable stages don't cause any symptoms. That is why it is important to have regular tests to check for cancer even when you might not notice anything wrong. Common Signs and Symptoms When colorectal cancer first develops, there may be no symptoms at all.
    