CEACAM5 and non-small cell lung carcinoma: Endobronchial ultrasound-guided transbronchial needle aspiration was used for nodal staging of NSCLC patients with radiological N2/3 disease (short axis >10 mm on computed tomography and/or standardized positron emission uptake value >2.5 on 2-deoxy-2[F-18] fluoro-d-glucose positron emission tomography), T-stage ≥ T2, or positive serum carcinoembryonic antigen.