NCI designation is associated with lower risk of postoperative death and improved long-term survival. Possible factors responsible for these benefits include surgeon training, multidisciplinary care, and adherence to treatment guidelines. Studies are underway to elucidate the factors leading to improved patient outcomes.
The 12-gene RS predicts recurrence in stage II colon cancer in CALGB 9581. This is consistent with the importance of stromal response and cell cycle gene expression in colon tumor recurrence. RS appears to be most discerning for patients with T3 MMR-I tumors, although markers such as grade and lymphovascular invasion did not add value in this subset of patients.
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