Group | Definition |
---|---|
I | Localized disease, completely resected |
II | Total gross resection, with evidence of regional spread |
 A | Grossly resected tumor with microscopic residual disease |
 B | Involved regional nodes completely resected with no microscopic residual disease |
 C | Involved regional nodes grossly resected with evidence of microscopic residual disease |
III | Biopsy only or incomplete resection with gross residual disease |
IV | Distant metastatic disease (excludes regional nodes and adjacent organ infiltration) |