CEACAM5 and metastatic malignant neoplasm in the lymph nodes: Rad-signature120kVp achieved the highest AUC (AUC=0.922) in prediction lymph node metastasis compared with other predictors [short-axis diameter (AUC=0.779, IDI=0.262) and long-axis diameter alone (AUC=0.714, IDI=0.329); CEA (AUC=0.540, IDI=0.414), and normalized DECT parameters (AUC=0.504~0.718, IDI=0.290-0.476)](P<0.05 in Delong tests).