To Evaluate the Role of Postoperative Radiotherapy in Patients With IIIA(N2) Non-Small Cell Lung Cancer

Summary

Rationale: Completely resected non-small cell lung cancer (NSCLC) patients with histologically confirmed N2 disease are a heterogeneous population, with 5-year survival rates ranging from 10% to 30%. Systemic recurrence following surgery is one of the major problems in stage IIIA(N2) patients, and the use of postoperative chemotherapy (POCT) in stage IIIA disease prolongs survival. The value of postoperative radiotherapy (PORT) for completely resected NSCLC remains controversial, as the effect on survival has been inconclusive. Recently, several large retrospective studies and reviews of the National Cancer Database indicated that modern PORT appears to confer an additional 5% survival advantage beyond that achieved with adjuvant chemotherapy alone. Actually, after complete resection and POCT, 20%-40% of cases have a risk of locoregional recurrence (LRR). Patients with completely resected stage IIIA(N2) disease might hold different postoperative patterns-of-failure and prognosis. It is not yet known for subsets with specific prognostic factors that confer lower LRR risks, whether giving PORT is more effective than no radiation therapy in treating patients with completely resected pathologic stage IIIA(N2) NSCLC. Purpose: This randomized phase II trial is studying the clinical efficacy of PORT administered using three-dimensional conformal radiotherapy (3D-CRT) techniques and the proposed standard PORT clinical target volume (CTV) delineation guideline in treating low risk of LRR patients with completely resected pathologic stage IIIA(N2) NSCLC.

Timeline

Start

2016-11

Primary completion

2021-12

Completion

2021-12

Publications

• Background NSCLC Meta-analyses Collaborative Group; Arriagada R, Auperin A, Burdett S, Higgins JP, Johnson DH, Le Chevalier T, Le Pechoux C, Parmar MK, Pignon JP, Souhami RL, Stephens RJ, Stewart LA, Tierney JF, Tribodet H, van Meerbeeck J. Adjuvant chemotherapy, with or without postoperative radiotherapy, in operable non-small-cell lung cancer: two meta-analyses of individual patient data. Lancet. 2010 Apr 10;375(9722):1267-77. doi: 10.1016/S0140-6736(10)60059-1. Epub 2010 Mar 24.
• Background Lally BE, Zelterman D, Colasanto JM, Haffty BG, Detterbeck FC, Wilson LD. Postoperative radiotherapy for stage II or III non-small-cell lung cancer using the surveillance, epidemiology, and end results database. J Clin Oncol. 2006 Jul 1;24(19):2998-3006. doi: 10.1200/JCO.2005.04.6110. Epub 2006 Jun 12.
• Background Douillard JY, Rosell R, De Lena M, Riggi M, Hurteloup P, Mahe MA; Adjuvant Navelbine International Trialist Association. Impact of postoperative radiation therapy on survival in patients with complete resection and stage I, II, or IIIA non-small-cell lung cancer treated with adjuvant chemotherapy: the adjuvant Navelbine International Trialist Association (ANITA) Randomized Trial. Int J Radiat Oncol Biol Phys. 2008 Nov 1;72(3):695-701. doi: 10.1016/j.ijrobp.2008.01.044. Epub 2008 Apr 24.
• Background Robinson CG, Patel AP, Bradley JD, DeWees T, Waqar SN, Morgensztern D, Baggstrom MQ, Govindan R, Bell JM, Guthrie TJ, Colditz GA, Crabtree TD, Kreisel D, Krupnick AS, Patterson GA, Meyers BF, Puri V. Postoperative radiotherapy for pathologic N2 non-small-cell lung cancer treated with adjuvant chemotherapy: a review of the National Cancer Data Base. J Clin Oncol. 2015 Mar 10;33(8):870-6. doi: 10.1200/JCO.2014.58.5380. Epub 2015 Feb 9.
• Background Billiet C, Decaluwe H, Peeters S, Vansteenkiste J, Dooms C, Haustermans K, De Leyn P, De Ruysscher D. Modern post-operative radiotherapy for stage III non-small cell lung cancer may improve local control and survival: a meta-analysis. Radiother Oncol. 2014 Jan;110(1):3-8. doi: 10.1016/j.radonc.2013.08.011. Epub 2013 Oct 4.
• Background Burdett S, Rydzewska L, Tierney J, Fisher D, Parmar MK, Arriagada R, Pignon JP, Le Pechoux C; PORT Meta-analysis Trialists Group. Postoperative radiotherapy for non-small cell lung cancer. Cochrane Database Syst Rev. 2016 Oct 11;10:CD002142. doi: 10.1002/14651858.CD002142.pub4.
• Background Feng W, Fu XL, Cai XW, Yang HJ, Wu KL, Fan M, Xiang JQ, Zhang YW, Chen HQ. Patterns of local-regional failure in completely resected stage IIIA(N2) non-small cell lung cancer cases: implications for postoperative radiation therapy clinical target volume design. Int J Radiat Oncol Biol Phys. 2014 Apr 1;88(5):1100-7. doi: 10.1016/j.ijrobp.2013.12.048. Epub 2014 Feb 11.

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