Proinflammatory markers, including neutrophil/lymphocyte ratio (NLR) and platelet/lymphocyte ratio (PLR), are associated with many aspects of different malignancies. The aim of this study was to assess the associations of NLR and PLR with estrogen receptor (ER) and progesterone receptor (PR) expression in locally advanced breast cancer patients and their changes after neoadjuvant chemotherapy (NAC). Whether these parameters were predictive for the response to NAC in breast cancer patients was also evaluated.