CEACAM5 and neoplasm: Compared with the clinicopathological nomogram, which comprised CT-reported T stage, CT-reported LN status, preoperative tumour differentiation, CEA level and CA 19-9 level, the TSP-based nomogram showed more robust performance to predict the LN status (AUROC comparison: 0.830 vs. 0.721; P < 0.001).