Prognostic role of neutrophil-to-lymphocyte ratio in breast cancer: a systematic review and meta-analysis

The presence of a high neutrophil-to-lymphocyte ratio (NLR) has been associated with increased mortality in several malignancies. Here, we quantify the effect of NLR on survival in patients with breast cancer, and examine the effect of clinicopathologic factors on its prognostic value.A systematic search of electronic databases was conducted to identify publications exploring the association of blood NLR (measured pre treatment) and overall...