J Cancer 2017; 8(6):1030-1037. doi:10.7150/jca.17400

Research Paper

Lymphocyte/Monocyte Ratio is a Novel Predictor for Early Stage Extranodal Natural Killer/T-cell Lymphoma, Nasal Type

Qiao-xuan Wang1,2*, Shao-hua Li1,3*, Bao-yan Ji4, Han-yu Wang1,2, Yi-yang Li5, Ling-ling Feng1,2, Kai Chen1,2✉, Yun-fei Xia1,2, Yu-jing Zhang1,2✉

1. State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangzhou, P R. China;
2. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou, P. R. China;
3. Department of Hepatobiliary Oncology, Sun Yat-sen University Cancer Center, Guangzhou, P. R. China;
4. Department of Oncology, Qinghai Province People's Hospital;
5. Department of Oncology, the First Affiliated Hospital of Guangdong Pharmaceutical University.
* These authors contributed equally to this work.

Abstract

Objective: Great heterogeneity exists in clinical behavior and survival outcome in patients with stage IE/IIE extranodal natural killer/T-cell lymphoma, nasal type (ENKTL). In this study, we proposed lymphocyte/monocyte ratio (LMR) as a new prognostic factor for these early stage ENKTL.

Methods: We retrospectively examined the LMR as a prognostic variable in a cohort of 379 patients with newly diagnosed stage IE/IIE ENKTL. The relationship between the LMR and clinicopathologic variables were analyzed in Kaplan-Meier log-rank survival analysis, and the Cox proportional hazards model was used to determine the survival significance of the LMR for both progression-free survival (PFS) and overall survival (OS).

Results: Patients were categorized into two different groups based on the LMR using cut-off value of 2.0. The 5-year PFS rates in the low and high LMR group were 43.9% and 62.7%, respectively, and the 5-year OS rates in the two groups were 59.1% and 77.7%, respectively. In multivariate analysis, low LMR at diagnosis was associated with worse PFS (hazard ratio 1.611, 95% confidence interval: 1.027-2.525, P =0.038) independent of age (P=0.033) and treatment stratagem (P<0.001), and indicated worse OS (hazard ratio 2.003, 95% confidence interval: 1.124-3.569, P =0.018) independent of age (P=0.007), LDH level (P=0.042), local tumor invasiveness (P=0.008), and treatment stratagem (P<0.001).

Conclusion: The LMR is an independent prognostic factor for both DFS and OS in patients with stage IE/IIE ENKTL, and provides additional prognostic value beyond standard clinicopathological parameters.

Keywords: extranodal natural killer/T-cell lymphoma, lymphocyte/monocyte ratio, prognosis

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) license (https://creativecommons.org/licenses/by-nc/4.0/). See http://ivyspring.com/terms for full terms and conditions.
How to cite this article:
Wang Qx, Li Sh, Ji By, Wang Hy, Li Yy, Feng Ll, Chen K, Xia Yf, Zhang Yj. Lymphocyte/Monocyte Ratio is a Novel Predictor for Early Stage Extranodal Natural Killer/T-cell Lymphoma, Nasal Type. J Cancer 2017; 8(6):1030-1037. doi:10.7150/jca.17400. Available from http://www.jcancer.org/v08p1030.htm