Evaluation of neutrophil-to-lymphocyte ratio in newly diagnosed patients receiving borte- zomib-based therapy for multiple myeloma.

Background: The neutrophil-to-lymphocyte ratio (NLR) at diagnosis has been identified as an independent prognostic marker in several malignancies. Recently, a few studies have reported that an elevated pretreatment NLR is associated with poor survival among multiple myeloma (MM) patients. However, the role of NLR at diagnosis in patients with MM treated with regimens containing bortezomib has been less explored.

Objective: We aimed to investigate the relationships between NLR and overall survival (OS) in newly diagnosed patients receiving bortezomib-based therapy for MM.

Methods: A total of 76 newly diagnosed patients with MM treated with bortezomib-based regimes were analyzed retrospectively. NLR was calculated from whole blood counts prior to therapy and subsequently correlated with OS.

Results: Complete remission (CR) was seen in 39.2% of patients with NLR < 2.95 compared to 20% in the group with NLR ⩾ 2.95 (P= 0.094). NLR was lower in CR patients in comparison to Non-CR subjects (P= 0.044). Patients with a NLR ⩾ 2.95 experienced inferior median survival compared to those with NLR < 2.95 (4-year OS rates were 30.9% and 64.8%, respectively, P= 0.029). In multivariate analysis, only elevated LDH and IgA MM were factors predicting inferior OS.

Conclusions: Elevated NLR was associated with poor OS in MM patients receiving induction therapy with bortezomib-based regimens, but it was not an independent prognostic factor in this patient cohort.