Original Study
Prognostic Value of Baseline Neutrophil-to-Lymphocyte Ratio in Metastatic Urothelial Carcinoma Patients Treated With First-line Chemotherapy: A Large Multicenter Study

https://doi.org/10.1016/j.clgc.2016.10.013Get rights and content

Abstract

Background

A high neutrophil-to-lymphocyte ratio (NLR) is a marker of systemic inflammation and is associated with poor survival in localized or metastatic cancer. This study assessed the prognostic value of NLR after first-line chemotherapy (CT) in patients with metastatic urothelial carcinoma (mUC).

Patients and Methods

Two hundred eighty consecutive patients treated with first-line platinum-based CT at 4 centers in France and Turkey between 2002 and 2014 were included. The association of NLR and Memorial Sloan Kettering Cancer Center (MSKCC) scores with overall survival (OS) and progression-free survival (PFS) was determined by univariate Cox models.

Results

Median OS was 10.6 months (follow-up, 42.8 months). In univariate analysis, high NLR was associated with worse OS (hazard ratio [HR] for death = 1.36; 95% confidence interval [CI], 1.23-1.51; P < .0001); the result was similar after adjustment for MSKCC prognostic group (HR = 1.28; 95% CI, 1.14-1.43; P < .0001). Low NLR was associated with longer PFS (HR = 1.18; 95% CI, 1.05-1.33; P < .005). When NLR was divided in terciles, OS in the lowest tercile (NLR 0.6-2.78) was 12.4 to 16.6 (median, 13.4) months versus 5.3 to 9.9 (median, 7.3) months in the highest tercile (NLR 4.70-48.9) (P = .001). Similar trends were observed for PFS (5.6-8.9 [median, 7.6] months vs. 3.1-5.7 [median, 4.8] months) in patients with NLR values in the lowest versus highest tercile, respectively (P = .021).

Conclusion

High pre-CT NLR was an independent prognostic factor for poor OS and PFS in mUC patients. The prognostic value of NLR, as either a continuous or categorical variable, compared favorably with MSKCC score but was easier to assess and monitor.

Introduction

Platinum-based chemotherapy (CT) is the standard of care for first-line treatment of metastatic urothelial cancer (mUC).1, 2, 3 Overall survival (OS) ranges from 14 to 15.2 months for patients receiving cisplatin-based CT1 and averages 9.8 months for those receiving carboplatin-based CT,4 although there is some heterogeneity between patients with respect to objective response rate and outcome.

The Memorial Sloan Kettering Cancer Center (MSKCC) risk score model is used in clinical practice to predict OS for mUC patients treated with platinum-based CT.5 This score is based on 2 prognostic factors: visceral (lung, liver, or bone) metastases and a Karnofsky performance status of < 80%, and it defines 3 prognostic groups (0, 1, or 2 poor prognostic factors). Several studies have investigated approaches to improve the predictive value of prognostic scores. A 4-variable model including hemoglobin levels below normal (< 11.5 g/dL in women and < 13 g/dL in men) and albumin was superior to the MSKCC risk score model.6 A 5-variable model has also been investigated that predicts the probability of OS at 1, 2 and 5 years on the basis of primary tumor site, number of visceral metastatic sites, presence of lymph node metastases, Eastern Cooperative Oncology Group performance status (ECOG PS), and leukocyte count.7

Other approaches to predicting risk are based on assessment of systemic inflammation, which is widely recognized as playing an important role in tumorogenesis.8 A high neutrophil-to-lymphocyte ratio (NLR), used as a simple biomarker of systemic inflammatory response, has been identified as a predictor of poor outcome9 in patients with a variety of tumor types, including metastatic lung cancer, breast cancer, or metastatic colorectal cancer10, 11, 12, 13 and urinary cancers including prostate cancer, renal-cell cancer, and bladder cancer.14, 15, 16, 17 In urothelial bladder cancer patients who underwent radical cystectomy for nonmetastatic disease, pretreatment NLR, or lymphocyte-to-monocyte ratio,18 has been shown to be a prognostic factor and is associated with poor OS, recurrence-free survival, and cancer-specific survival.19, 20, 21 A retrospective study including 26 patients showed that a sustained decrease in NLR before and after neoadjuvant CT was associated with pathologic response, suggesting a link between a reduction in the inflammatory environment and outcome.22

This study assessed the prognostic value of pretreatment NLR in mUC patients who had undergone first-line platinum-based CT.

Section snippets

Patients

All consecutive patients with histologically confirmed carcinoma of the urinary tract who received first-line platinum-based CT for metastatic disease from 2002 to 2014 at 3 centers in France (Georges Pompidou Hospital, Paris; Saint-Louis Hospital, Paris; La Louvière Private Hospital, Lille) and one in Turkey (Cerrahpaşa Medical Faculty, Istanbul) were included. Most of the fit patients received CT with cisplatin and gemcitabine or methotrexate, vinblastine, Adriamycin, and cisplatin (M-VAC),

Patients

A total of 280 mUC patients were evaluated. Patients were older (median age, 65 years), the majority were men, and the primary tumor site was the bladder in 241 patients (86.1%). Full details of patient demographic, clinical, and pathologic data at baseline are shown in Table 1. First-line CT was based on cisplatin in 170 patients (58%) and carboplatin in 123 patients (42%). Median NLR was 3.8 (range, 0.6-48.9), with distribution shown in Figure 1.

Survival

A total of 234 of 280 patients died. Median

Discussion

The results of this study showed that pre-CT NLR was an independent prognostic predictor of OS and PFS in mUC patients. As has been seen in patients with early-stage bladder cancer, pre-CT NLR was significantly correlated with PFS and OS in mUC patients who had received first-line CT. Marked and significant differences in OS were seen between patients with NLR values in the first (lowest) and third (highest) terciles of NLR.

Our results in a large white population support those of previous

Conclusion

The results of this study showed that pre-CT NLR was an independent prognostic predictor of OS and PFS in mUC patients. These results highlight the importance of an inflammatory cancer-related microenvironment and strengthen the necessity to review the decision of a specific treatment, taking into account, in particular, the tumor microenvironment, molecular subtypes, and immune response to offer the best treatment to each patient.

Disclosure

The authors have stated that they have no conflict of interest.

Acknowledgment

English-language editing assistance was provided by Nicola Ryan, independent medical writer.

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