TNM Staging Criteria for Tumors
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Tumors are staged using the TNM staging criteria. T = Tumor (T1 - T4), representing the size and extent of the tumor. N = Node (N0 - N3), relating to the number of regional lymph nodes involved. M = Metastasis (M0 or M1) meaning no metastasis (M0) or metastasis present (M1).
