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Multivariate logistic regression analysis confirmed that CEA, grading, and PNI were independent prognostic factors of LNM (P 0.05). The nomogram for predicting LNM risk showed acceptable consistency and calibration capability in the training and validation sets. Preoperative CEA level, grading, and PNI were independent risk factor for LNM. Based on the present parameters, the constructed prediction model of LNM has potential application value. Preoperative CEA level, grading, and PNI were independent risk factor for LNM. Based on the presen