Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Childhood Brain Stem Glioma ?
    ### Response:
    Tests that examine the brain are used to detect (find) childhood brain stem glioma. The following tests and procedures may be used:         -   Physical exam and history : An exam of the body to check general signs of health, including checking for signs of disease, such as lumps or anything else that seems unusual.
    