Prognostic value of neutrophil/lymphocyte ratio, lymphocyte/monocyte ratio, lactate dehydrogenase, and mean platelet volume in the diagnosis of patients with diffuse large B-cell lymphoma

Background Diffuse large B-cell lymphoma (DLBCL), a heterogeneous type of lymphoma, encompasses various biologic abnormalities and numerous morphologic variants, showing several clinical findings and responses to treatments. Lactate dehydrogenase (LDH) is a well-established diagnostic and prognostic marker for DLBCL, and neutrophil/lymphocyte ratio (NLR), lymphocyte-to-monocyte ratio (LMR), and mean platelet volume (MPV) have been shown to have prognostic values in several malignancies. Objectives In the study, we examined the prognostic value of LMR, NLR, LDH, and MPV in the stage and prognosis of DLBCL by analyzing the data of patients treated with rituximab-based chemotherapies. Patients and methods A total of 188 patients diagnosed as having DLBCL between January 2012 and January 2020 were selected. DLBCL stages were categorized as early and late, international prognostic index was categorized as below and above 4, and the treatment response was categorized as responders and nonresponders. NLR, LMR, LDH, MPV, and other factors predicting these outcomes were analyzed. Results Logistic regression analysis showed that the factors influencing stage of DLBCL were NLR [P=0.009, odds ratio (OR)=1.220, 95% confidence interval (CI): 1.050-1.417] and LDH (P=0.001, OR=0.286, 95% CI: 0.146-0.561). The factor influencing international prognostic index score was LMR (P=0.001, OR=6.226, 95% CI: 2.092-18.533). Factors influencing response were R-CHOP treatment (P=0.001, OR=0.181, 95% CI: 0.068-0.478) and stage (P=0.005, OR=18.306, 95% CI: 2.383-140.607). Conclusion The pretreatment LMR, NLR, LDH, and MPV values may affect the stage and prognosis of DLBCL, which showed influences on the treatment response.