CEACAM5 and neoplasm: Sex (male patients), maximum diameter of the tumor (> 1.6 cm), position (right lower lobe, and right middle lobe), tumor differentiation, pulmonary membrane invasion, bronchial mucosa and cartilage invasion, vascular invasion, nerve invasion, CEA (> 2.21 ng/mL), and albumin (≤43.1 g/L, 11.5%) were the 10 significant risk factors associated with the presence of metastatic lobe specific mediastinal lymph nodes.