Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Thymoma and Thymic Carcinoma ?
    ### Response:
    Key Points
                    - Thymoma and thymic carcinoma are diseases in which malignant (cancer) cells form on the outside surface of the thymus.    -  Thymoma is linked with myasthenia gravis and other autoimmune diseases.    - Signs and symptoms of thymoma and thymic carcinoma include a cough and chest pain.
    