According to the univariate analysis, patients were more likely to be diagnosed with IA if they had these factors: more than 58.5 years, a serum CEA level > 1.970 μg/L, a tumor size > 13.50 mm, mGGO and bubble-like sign (p: 0.005, 0.001, 0.000, 0.000, and 0.001, respectively). This evidence concerns the gene CEACAM5 and neoplasm.