One study found that a high baseline CEA level (≥ 5 ng/mL) was linked to poor post‐operative survival in stage I‐IIIA NSCLC patients, although the study did not evaluate the prognostic value of CEA based on EGFR‐wild and EGFR‐mutant subgroups [32]. The gene discussed is CEACAM5; the disease is non-small cell lung carcinoma.