Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Childhood Astrocytomas ?
    ### Response:
    Key Points
                    - Childhood astrocytoma is a disease in which benign (noncancer) or malignant (cancer) cells form in the tissues of the brain.     - Astrocytomas may be benign (not cancer) or malignant (cancer).    - The central nervous system controls many important body functions.
    