Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Paranasal Sinus and Nasal Cavity Cancer ?
    ### Response:
    Key Points
                    - Paranasal sinus and nasal cavity cancer is a disease in which malignant (cancer) cells form in the tissues of the paranasal sinuses and nasal cavity.    - Different types of cells in the paranasal sinus and nasal cavity may become malignant.
    