Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the stages of Paranasal Sinus and Nasal Cavity Cancer ?
    ### Response:
    Key Points
                    - After paranasal sinus and nasal cavity cancer has been diagnosed, tests are done to find out if cancer cells have spread within the paranasal sinuses and nasal cavity or to other parts of the body.     - There are three ways that cancer spreads in the body.
    