Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Childhood Ependymoma ?
    ### Response:
    Key Points
                    - Childhood ependymoma is a disease in which malignant (cancer) cells form in the tissues of the brain and spinal cord.    - There are different types of ependymomas.    - The part of the brain that is affected depends on where the ependymoma forms.
    