RT Journal Article T1 Neoadjuvant treatment followed by surgery versus definitive chemoradiation in stage IIIA-N2 non-small-cell lung cancer: A multi-institutional study by the oncologic group for the study of lung cancer (Spanish Radiation Oncology Society) A1 Couñago, F. A1 Alcántara Carrió, María Del Pino A1 Corona Sánchez, Juan Antonio A1 Taboada, B. AB Objectives: The role of surgery in stage IIIA-N2 non-small cell lung cancer (NSCLC) is an actively debated in oncology. To evaluate the value of surgery in this patient population, we conducted a multi-institutional retrospective study comparing neoadjuvant chemoradiotherapy or chemotherapy plus surgery (CRTS) to definitive chemoradiotherapy (dCRT).Material and methods: A total of 247 patients with potentially resectable stage T1-T3N2M0 NSCLC treated with either CRTS or dCRT between January 2005 and December 2014 at 15 hospitals in Spain were identified. A centralized review was performed to ensure resectability. A propensity score matched analysis was carried out to balance patient and tumor characteristics (n = 78 per group).Results: Of the 247 patients, 118 were treated with CRTS and 129 with dCRT. In the CRTS group, 62 patients (52.5%) received neoadjuvant CRT and 56 (47.4%) neoadjuvant chemotherapy. Surgery consisted of either lobectomy (97 patients; 82.2%) or pneumonectomy (21 patients; 17.8%). In the matched samples, median overall survival (OS; 56 vs 29 months, log-rank p = .002) and progression-free survival (PFS; 46 vs 15 months, log-rank p < 0.001) were significantly higher in the CRTS group. This survival advantage for CRTS was maintained in the subset comparison between the lobectomy subgroup versus dCRT (OS: 57 vs 29 months, p < 0.001; PFS: 46 vs 15 months, p < 0.001), but not in the comparison between the pneumonectomy subgroup and dCRT.Conclusion: The findings reported here indicate that neoadjuvant chemotherapy or chemoradiotherapy followed by surgery (preferably lobectomy) yields better OS and PFS than definitive chemoradiotherapy in patients with resectable stage IIIA-N2 NSCLC. PB Elsevier SN 0169-5002 YR 2018 FD 2018-02-15 LK https://hdl.handle.net/20.500.14352/100379 UL https://hdl.handle.net/20.500.14352/100379 LA eng NO Couñago F, Rodriguez de Dios N, Montemuiño S, Jové-Teixidó J, Martin M, Calvo-Crespo P, López-Mata M, Samper-Ots MP, López-Guerra JL, García-Cañibano T, Díaz-Díaz V, de Ingunza-Barón L, Murcia-Mejía M, Alcántara P, Corona J, Puertas MM, Chust M, Couselo ML, Del Cerro E, Moradiellos J, Amor S, Varela A, Thuissard IJ, Sanz-Rosa D, Taboada B. Neoadjuvant treatment followed by surgery versus definitive chemoradiation in stage IIIA-N2 non-small-cell lung cancer: A multi-institutional study by the oncologic group for the study of lung cancer (Spanish Radiation Oncology Society). Lung Cancer. 2018 Apr;118:119-127. doi: 10.1016/j.lungcan.2018.02.008. Epub 2018 Feb 14. NO Spanish Society of Radiation Oncology DS Docta Complutense RD 8 abr 2025