Abstract
Purpose
Current evidence suggests that the neutrophil-to-lymphocyte ratio (NLR) is a prognostic factor in several types of cancer. In this study, we aimed to evaluate the prognostic impact of clinicopathological factors, including postoperative NLR, in patients with locally advanced non-small-cell lung cancer (LA-NSCLC) who underwent surgery after chemoradiotherapy (CRT) with or without postoperative adjuvant chemotherapy.
Methods
The medical records of LA-NSCLC patients treated with trimodality therapy at our institution between June 1999 and May 2019 were reviewed. The association between several clinicopathological factors and overall survival (OS) was analyzed.
Results
A total of 168 patients were included in this study. Regarding the prognosis, the 5-year OS rate was 68.1%, and the 2-year recurrence-free survival rate was 66.1% in the entire population. In multivariate analysis, we identified that high postoperative NLR, not pretreatment or preoperative NLR, was one of the independent factors for unfavorable OS (NLR high vs NLR low; hazard ratio = 2.45, 95% confidence interval: 1.53–3.94, p < 0.001). In addition, among patients with high postoperative NLR, patients who received postoperative adjuvant chemotherapy showed significantly better 5-year OS compared with those who did not (p = 0.016). On the other hand, postoperative adjuvant chemotherapy had no impact on the prognosis in patients with low NLR (p = 0.19).
Conclusions
Our results suggest that high postoperative NLR was not only an independent unfavorable prognostic factor in patients with LA-NSCLC who were treated with trimodality therapy, but also a promising indicator for postoperative treatment in this population.
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Acknowledgement
This work was supported by a Management Expenses Grant for National University Corporations in Japan. We would like to thank Editage (http://www.editage.com) for English language editing.
Funding
This work was supported by a Management Expenses Grant for National University Corporations in Japan.
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Katsuyuki Kiura; Ono Pharmaceutical Co., Ltd.; Boehringer Ingelheim Co., Ltd.; Taiho Pharmaceutical Co., Ltd.; Chugai Pharmaceutical Co., Ltd.; Nippon Kayaku Co., Ltd.; Bristol-Myers Squibb K.K.; MSD K.K.; Pfizer Japan Inc.; TEIJIN Pharma Limited.; KYORIN Pharmaceutical Co., Ltd.; Merck Biopharma Co., Ltd.; Daiichi Sankyo Co., Ltd.; SHIONOGI & Co., Ltd.; Takeda Pharmaceutical Co., Ltd.; AstraZeneca K.K.; Eli Lilly Japan K.K.; Novartis International AG.
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10434_2021_9690_MOESM2_ESM.tif
Supplementary Fig. 1. ROC curves to determine the cutoff value for pretreatment, preoperative and postoperative NLR (TIF 512 kb)
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Supplementary Fig. 2. Overall survival (OS) stratified by the completion of postoperative adjuvant chemotherapy in the high postoperative NLR (≥ 4.06) group of patients who underwent postoperative adjuvant chemotherapy (TIF 410 kb)
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Tsudaka, S., Yamamoto, H., Sato, H. et al. Prognostic Significance of Neutrophil-to-Lymphocyte Ratio in Locally Advanced Non-small-cell Lung Cancer Treated with Trimodality Therapy. Ann Surg Oncol 28, 4880–4890 (2021). https://doi.org/10.1245/s10434-021-09690-9
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DOI: https://doi.org/10.1245/s10434-021-09690-9