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Article Abstract
Mantle cell lymphoma (MCL) pathogenesis is strongly related to the role of the tumor immune microenvironment (TIME) in which MCL cells proliferate. TIME cells can produce growth signals influencing MCL cells' survival and exert an antitumoral immune response suppression. The activity of TIME cells might be mirrored by some ratios of peripheral blood cell subpopulations, such as the monocyte-to-platelet ratio (MPR). We reviewed the clinical features of 165 consecutive MCL patients newly diagnosed and not eligible for autologous stem cell transplantation (both for age or comorbidities) who accessed two Italian Centers between 2006 and 2020. MPR was calculated using data obtained from the complete blood cell count at diagnosis before any cytotoxic treatment and correlated with PFS. Univariate analysis showed that MPR ≥ 3 was associated with inferior PFS (p = 0.02). Multivariate analysis confirmed that MPR ≥ 3, LDH > 2.5 ULN, and bone marrow involvement were significant independent variables in predicting PFS. For these reasons, MPR ≥ 3 seems the most promising prognostic factor in patients with MCL, and it could be considered a variable in new predictive models.
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