Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Oropharyngeal Cancer ?
    ### Response:
    Key Points
                    - Oropharyngeal cancer is a disease in which malignant (cancer) cells form in the tissues of the oropharynx.    - Smoking or being infected with human papillomavirus can increase the risk of oropharyngeal cancer.     - Signs and symptoms of oropharyngeal cancer include a lump in the neck and a sore throat.
    