Hypo-fractionated radiotherapy with concurrent chemotherapy for locoregional recurrence of non-small cell lung cancer after complete resection: A prospective, single-arm, phase II study (GASTO-1017)
NaiBin Chen, QiWen Li, SiYu Wang, Mai Xiong, YiFeng Luo, Bin Wang, Li Chen, MaoSheng Lin, XiaoBo Jiang, JianLan Fang, SuPing Guo, JinYu Guo, Nan Hu, XinLei Ai, DaQuan Wang, Chu Chu, FangJie Liu, Hao Long, JunYe Wang, Bo Qiu, Hui Liu, NaiBin Chen, QiWen Li, SiYu Wang, Mai Xiong, YiFeng Luo, Bin Wang, Li Chen, MaoSheng Lin, XiaoBo Jiang, JianLan Fang, SuPing Guo, JinYu Guo, Nan Hu, XinLei Ai, DaQuan Wang, Chu Chu, FangJie Liu, Hao Long, JunYe Wang, Bo Qiu, Hui Liu
Abstract
Objectives: To explore the efficacy and toxicities of split-course hypo-fractionated radiotherapy with concurrent chemotherapy (HFRT-CHT) with intensity modulated radiotherapy (IMRT) technique in non-small cell lung cancer (NSCLC) patients with postoperative locoregional recurrence (LRR).
Materials and methods: NSCLC patients were eligible if confirmed as LRR disease without distant metastasis after complete resection. HFRT-CHT using IMRT technique was administered with 51 Gy in 17 fractions or 40 Gy in 10 fractions as the first course followed by a break. Patients with no disease progression and no persistent Grade ≥2 toxicities had the second course of 15 Gy in 5 fractions or 28 Gy in 7 fractions as a boost. The primary endpoint was progression-free survival (PFS).
Results: Fifty-eight patients were enrolled and analyzed. With a median follow-up of 23.9 months for all, the 2-year and 3-year PFS rate was 59.7 % and 46.4 %, the 2-year and 3-year OS rate was 72.5 % and 52.2 %, respectively, and a favorable objective response rate of 95.9 % was obtained after the whole courses protocol. Grade 3 acute pneumonitis and esophagitis occurred in 2 (3.4 %) and 7 (12.1 %) patients, and fatal pneumonitis was reported in one case (1.7 %). Exploratory subgroup analysis showed that performance status (PS) (PS 0 vs. 1: 2-year PFS, 88.1 % vs. 46.9 %,P = 0.001; 2-year OS, 100 % vs. 59.4 %, P < 0.001), recurrence site (single vs. multiple: 2-year PFS, 93.8 % vs. 47.4 %, P = 0.008; 2-year OS, 100 % vs. 63.0 %, P = 0.001), and gross tumor volume (GTV) (<50cm3 vs. ≥ 50cm3: 2-year PFS, 70.6 % vs. 46.2 %, P = 0.024; 2-year OS, 85.6 % vs. 57.4 %, P = 0.034) were significantly associated with PFS and OS.
Conclusion: Split-course HFRT-CHT with IMRT technique achieved promising disease control and satisfactory survival with moderate toxicities in postoperative LRR of NSCLC. Good PS, a single recurrence site and GTV<50cm3 tended to have prolonged PFS and OS. Early detection of LRR may improve the efficacy of HFRT-CHT.
Trial registration: ClinicalTrials.gov NCT03006575.
Keywords: Hypo-fractionated radiotherapy with concurrent chemotherapy; Non-small cell lung cancer; Postoperative locoregional recurrence; Survival; Toxicities.
Copyright © 2021 The Author(s). Published by Elsevier B.V. All rights reserved.
Source: PubMed