Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Ewing Sarcoma ?
    ### Response:
    Tests that examine the bone and soft tissue are used to diagnose and stage Ewing sarcoma.
                    Procedures that make pictures of the bones and soft tissues and nearby areas help diagnose Ewing sarcoma and show how far the cancer has spread. The process used to find out if cancer cells have spread within and around the bones and soft tissues is called staging.
    