Pretreatment Lymphocyte to Monocyte Ratio as a Prognostic Marker for Advanced Pulmonary Squamous Cell Carcinoma Treated With Chemotherapy

Seigo Minami, Shouichi Ihara, Kiyoshi Komuta

Abstract


Background: Lower lymphocyte to monocyte ratio (LMR), higher neutrophil to lymphocyte ratio (NLR) and modified Glasgow prognostic score (mGPS) 2 have been demonstrated as independent prognostic markers for poor prognosis of advanced non-small cell lung cancer (NSCLC). However, little is known about these three markers as prognostic markers for a specific histological subset of NSCLC, squamous cell carcinoma (SCC). This study aimed to evaluate the prognostic significance of LMR, NLR and mGPS for advanced SCC.

Methods: We retrospectively collected 107 patients who met the following criteria: pathologically confirmed SCC, chemo-naive patients who had initiated first-line cytotoxic chemotherapy between September 2007 and February 2017 at our institution, and c-stage IIIB, IV or recurrence after curative-intent surgery or thoracic radiotherapy. In order to demonstrate these three markers as significant prognostic factors, we compared overall survival (OS) between two groups divided by LMR, NLR and mGPS 0 - 1 versus 2, and performed univariate and multivariate Cox proportional hazard analyses.

Results: Groups with low LMR (< 2.07) and high NLR (≥ 5.28) experienced shorter OS (LMR: 6.5 versus 15.6 months in median, P < 0.01; NLR: 8.2 versus 15.6 months, P < 0.01) than groups with high LMR (≥ 2.07) and low NLR (< 5.28). However, no significant difference was detected in OS between mGPS 0 - 1 and 2 (13.0 versus 13.7 months, P = 0.61). As significant poor prognostic factors, our multivariate Cox hazard analysis detected ECOG PS 2 - 4 (hazard ration (HR): 3.09, 95% confidence interval (CI): 1.77 - 5.40; P < 0.01) and LMR < 2.07 (HR: 0.39, 95% CI: 0.21 - 0.79; P < 0.01). However, NLR was not selected in the multivariate analysis.

Conclusion: LMR is an independent prognostic factor for advanced pulmonary SCC. Neither NLR nor mGPS is useful as prognostic factor for this histology. The optimal prognostic markers may differ from each subset of NSCLC.




J Clin Med Res. 2018;10(8):657-664
doi: https://doi.org/10.14740/jocmr3490w


Keywords


Lymphocyte to monocyte ratio; Neutrophil to lymphocyte ratio; Modified Glasgow prognostic score; Squamous cell carcinoma; Non-small cell lung cancer; First-line chemotherapy; Overall survival; Progression-free survival

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