Certain factors affect prognosis (chance of recovery). The factors that affect prognosis (chance of recovery) are different before and after treatment. Before treatment, prognosis depends on: - Whether the tumor has spread to lymph nodes or distant parts of the body. - Where in the body the tumor started. - Whether the tumor formed in the bone or in soft tissue. - How large the tumor is at when the tumor is diagnosed. - Whether the LDH level in the blood is higher than normal. - Whether the tumor has certain gene changes. - Whether the child is younger than 15 years. - The patients gender. - Whether the child has had treatment for a different cancer before Ewing sarcoma. - Whether the tumor has just been diagnosed or has recurred (come back). After treatment, prognosis is affected by: - Whether the tumor was completely removed by surgery. - Whether the tumor responds to chemotherapy or radiation therapy. If the cancer recurs after initial treatment, prognosis depends on: - Whether the cancer came back more than two years after the initial treatment. - Where in the body the tumor came back. - The type of initial treatment given. 
What is the outlook for Ewing Sarcoma ?