However, smoking, CEA level ≥ 5 ng/mL, surgical approach (VATS + VATS), different pathology, largest tumor size > 2 cm, most advanced pTNM stage (II + III), largest pT stage (T2 + T3), and highest pN stage (1 + 2) were associated with poor OS (Figures S2–S9). Here, CEACAM5 is linked to neoplasm.