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The unpredictable erythrocyte deformability alteration in some hematological disorders: How the classification of primary hyperviscosity syndromes could change.

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According to Wells classification, it is possible to distinguish the primary hyperviscosity syndromes in polycythemic, sclerocythemic and sieric and/or plasmatic. In polycythemia vera, multiple myeloma, Waldenström's macroglobulinemia, and monoclonal gammopathy… Click to show full abstract

According to Wells classification, it is possible to distinguish the primary hyperviscosity syndromes in polycythemic, sclerocythemic and sieric and/or plasmatic. In polycythemia vera, multiple myeloma, Waldenström's macroglobulinemia, and monoclonal gammopathy of undetermined significance, we have observed an unexpected behaviour of the erythrocyte deformability. This data highlights that the hemorheological alteration present in polycythemia vera has not been related to the increase of RBC mass only, as well as that present in plasmacellular dyscrasias has not been attributable to the increase of plasma viscosity only.The aim of this paper is to suggest some starting points for an accurate reflection, emphasizing the need of a revision of the current classification of primary hyperviscosity syndromes.

Keywords: erythrocyte deformability; classification primary; primary hyperviscosity; hyperviscosity syndromes

Journal Title: Clinical hemorheology and microcirculation
Year Published: 2023

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