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The prognosis of colon cancer is determined by tumor dimensions, number of metastatic lymph nodes and the presence of distant metastasis. Altogether, these criteria comprise the TNM (tumor-node-metastasis) staging system. Some societies consider a minimum of 12 lymph nodes to access the prognosis, but it is not always possible to resect this number of lymph nodes during the surgery. The lymph node ratio, calculated as the division between the number of metastatic lymph nodes and the number of resected lymph nodes, seems to demonstrate a superior prognostic value because it is independent from the extent of lymphadenectomy.
Macedo et al. 2021 Future Oncology 17: 1519–1532…