Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the stages of Childhood Hodgkin Lymphoma ?
    ### Response:
    Key Points
                    - After childhood Hodgkin lymphoma has been diagnosed, tests are done to find out if cancer cells have spread within the lymph system or to other parts of the body.    - There are three ways that cancer spreads in the body.    - Stages of childhood Hodgkin lymphoma may include A, B, E, and S.
    