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  • Stage 1 : The cancer is non-invasive and limited to the origin site. It does not spread to lymph nodes or distant organs.
  • Stage 2 : The cancer is invasive but does not spread to lymph nodes and distant organs.
  • Stage 3 : The cancer is invasive and may spread to lymph nodes. There is no sign of metastasis.
  • Stage 4 : Cancer spreads to the lymph nodes and distant organs.