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  • Stage 1 : At this stage, Ewing sarcoma is related to one tumor.
  • Stage 2 : At stage 4, Ewing sarcoma spreads to distant organs and lymph nodes.
  • Stage 3 : As an Ewing tumor is usually aggressive, stage 1 is not designated for Ewing sarcoma.
  • Stage 4 : Ewing sarcoma spreads to multiple tumors in the same bone. The tumor has not spread to distant areas.