CEACAM5 and neoplasm: The results disclosed that sex (male patients), maximum diameter of the tumor (> 1.6 cm), position (right lower lobe, left lower lobe, and bilateral mixed lobes), pulmonary membrane invasion, bronchial mucosa and cartilage invasion, vascular invasion, CEA (> 2.21 ng/mL), and albumin (≤43.1 g/L) were the 8 significant risk factors associated with the presence of metastatic interlobar lymph nodes.