Postoperative Radiotherapy for Patients With IIIA (N2) Non-small Cell Lung Cancer

Post-Operative Radiation Therapy for Patients With pⅢA-N2 Non-Small Cell Lung Cancer After Complete Resection and Adjuvant Chemotherapy: A Prospective Randomized Phase Ⅲ Study

Several important international randomized trials have shown that postoperative chemotherapy contributed to the improvement on 5 year survival rate by about 4% for patients with non-small cell lung cancer (NSCLC) after complete resection. But the overall survival rate was relatively low and the local recurrence was still the dominant failure pattern for stage IIIA (N2) disease even these patients received the postoperative chemotherapy. Several meta-analyses have shown that postoperative radiotherapy (PORT) has no effect on the survival improvement for patients with NSCLC after complete resection. However, sub-group analysis based on the same dataset of these meta-analyses showed that the PORT with conventional radiotherapy might be beneficial for stage IIIA (N2) disease. The 3D conform radiotherapy (3D-CRT) and intensity modified radiotherapy (IMRT) can increase the radiation dose to the target volume while decreasing the dose to risk organs comparing with the conventional radiotherapy. So it is expected that PORT using 3D-CRT or IMRT after postoperative chemotherapy will improve the local control and survival for stage IIIA (N2) NSCLC. Here, the investigators designed a phase III randomized trial to compare the 3-year disease free survival (DFS) and overall survival (OS) rates in patients with completely resected stage IIIA (N2) NSCLC who receive adjuvant chemotherapy alone or adjuvant chemotherapy plus PORT.

OBJECTIVES: Primary: To determine whether administering adjuvant chemotherapy (four cycles of platinum-based doublet regimen) plus PORT (50 Gy, 2 Gy once daily over 5 weeks) will improve 3-year DFS compared with adjuvant chemotherapy alone in patients with completely resected stage IIIA (N2) NSCLC. Secondary: To compare treatment-related toxic effects, 3-year OS, failure-free survival, and the patterns of failure. OUTLINE: Eligible patients were randomized equally, using simple randomization, to either PORT or observation group. Arm I: Patients undergo PORT using 3D-CRT or IMRT (50 Gy, 2 Gy once daily over 5 weeks) after adjuvant chemotherapy. Arm II: Patients undergo adjuvant chemotherapy. After completion of study treatment, patients are followed every 3 months for 1 year, every 6 months for 2 years, and then annually thereafter.

Patients undergo thoracic radiotherapy using 3D-CRT or IMRT (50 Gy, 2 Gy once daily over 5 weeks) after postoperative chemotherapy.

Postoperative radiotherapy using 3D-CRT or IMRT techniques, 2 Gy per fraction, total 25 fractions (50Gy) over 5 weeks.

CTC AE 3.0 is used to evaluate the toxicities, including radiation esophagitis (RE) and pneumonitis (RP).

Inclusion Criteria: Completely resected disease by lobectomy, bilobectomy. Complete dissection of lymph nodes at levels 4, 7, and 10 in case of right-sided thoracotomy and at levels 4 (if accessible), 5, 6, 7, and 10 in case of left-sided thoracotomy. Histologically N2 disease after surgery. Negative margins Has undergone chemotherapy of four cycles of platinum-based doublet regimen and no recurrence and metastasis Exclusion Criteria: Pregnant or nursing ECOG performance status > 1 Post-operative FEV_1 < 1 L (or < 35% theoretical value, PO_2 < 70 mm Hg, and PCO_2 > 45 mm Hg) Severe cardiac disease within the past 6 months, including the following: Arrhythmia, Congestive heart failure, Infarction, Pacemaker Severe pulmonary disease within the past 6 months Other prior or concurrent neoplasm, except for basal cell carcinoma of the skin or carcinoma in situ of the cervix Severe or uncontrolled systemic disease Familial, social, geographic, or psychological conditions that would preclude study participation

Chemotherapy in non-small cell lung cancer: a meta-analysis using updated data on individual patients from 52 randomised clinical trials. Non-small Cell Lung Cancer Collaborative Group. BMJ. 1995 Oct 7;311(7010):899-909.

Postoperative radiotherapy in non-small-cell lung cancer: systematic review and meta-analysis of individual patient data from nine randomised controlled trials. PORT Meta-analysis Trialists Group. Lancet. 1998 Jul 25;352(9124):257-63.

Keller SM, Adak S, Wagner H, Herskovic A, Komaki R, Brooks BJ, Perry MC, Livingston RB, Johnson DH. A randomized trial of postoperative adjuvant therapy in patients with completely resected stage II or IIIA non-small-cell lung cancer. Eastern Cooperative Oncology Group. N Engl J Med. 2000 Oct 26;343(17):1217-22. doi: 10.1056/NEJM200010263431703.

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.

Machtay M, Lee JH, Shrager JB, Kaiser LR, Glatstein E. Risk of death from intercurrent disease is not excessively increased by modern postoperative radiotherapy for high-risk resected non-small-cell lung carcinoma. J Clin Oncol. 2001 Oct 1;19(19):3912-7. doi: 10.1200/JCO.2001.19.19.3912.

Matsuguma H, Nakahara R, Ishikawa Y, Suzuki H, Inoue K, Katano S, Yokoi K. Postoperative radiotherapy for patients with completely resected pathological stage IIIA-N2 non-small cell lung cancer: focusing on an effect of the number of mediastinal lymph node stations involved. Interact Cardiovasc Thorac Surg. 2008 Aug;7(4):573-7. doi: 10.1510/icvts.2007.174342. Epub 2008 Apr 15.

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.

Strauss GM, Herndon JE 2nd, Maddaus MA, Johnstone DW, Johnson EA, Harpole DH, Gillenwater HH, Watson DM, Sugarbaker DJ, Schilsky RL, Vokes EE, Green MR. Adjuvant paclitaxel plus carboplatin compared with observation in stage IB non-small-cell lung cancer: CALGB 9633 with the Cancer and Leukemia Group B, Radiation Therapy Oncology Group, and North Central Cancer Treatment Group Study Groups. J Clin Oncol. 2008 Nov 1;26(31):5043-51. doi: 10.1200/JCO.2008.16.4855. Epub 2008 Sep 22.

Ng R, Hasan B, Mittmann N, Florescu M, Shepherd FA, Ding K, Butts CA, Cormier Y, Darling G, Goss GD, Inculet R, Seymour L, Winton TL, Evans WK, Leighl NB; Working Group on Economic Analysis; Lung Disease Site Group; National Cancer Institute of Canada Clinical Trials Group. Economic analysis of NCIC CTG JBR.10: a randomized trial of adjuvant vinorelbine plus cisplatin compared with observation in early stage non-small-cell lung cancer--a report of the Working Group on Economic Analysis, and the Lung Disease Site Group, National Cancer Institute of Canada Clinical Trials Group. J Clin Oncol. 2007 Jun 1;25(16):2256-61. doi: 10.1200/JCO.2006.09.4342.

Dunant A, Pignon JP, Le Chevalier T. Adjuvant chemotherapy for non-small cell lung cancer: contribution of the International Adjuvant Lung Trial. Clin Cancer Res. 2005 Jul 1;11(13 Pt 2):5017s-5021s. doi: 10.1158/1078-0432.CCR-05-9006.

Hui Z, Men Y, Hu C, Kang J, Sun X, Bi N, Zhou Z, Liang J, Lv J, Feng Q, Xiao Z, Chen D, Wang Y, Li J, Wang J, Gao S, Wang L, He J. Effect of Postoperative Radiotherapy for Patients With pIIIA-N2 Non-Small Cell Lung Cancer After Complete Resection and Adjuvant Chemotherapy: The Phase 3 PORT-C Randomized Clinical Trial. JAMA Oncol. 2021 Aug 1;7(8):1178-1185. doi: 10.1001/jamaoncol.2021.1910.

Wang J, Hui Z, Men Y, Kang J, Sun X, Deng L, Zhai Y, Wang W, Bi N, Liang J, Lv J, Zhou Z, Feng Q, Xiao Z, Chen D, Wang L, Zhao J. Systemic Inflammation-Immune Status Predicts Survival in Stage III-N2 Non-Small Cell Lung Cancer. Ann Thorac Surg. 2019 Dec;108(6):1701-1709. doi: 10.1016/j.athoracsur.2019.06.035. Epub 2019 Aug 7.