Thrombocytopenia and hemorrhagic pleural effusion as an initial presentation of polycythemia vera

Abstract

Polycythemia vera (PV) is a chronic myeloproliferative disorder in which there is an alteration in the pluripotent progenitor cell leading to excessive clonal proliferation of erythroid, myeloid and megakaryocytic progenitor cells. The natural history of PV can be divided into several stages, beginning with asymptomatic, isolated erythrocytosis, progressing to more generalized myeloid proliferation, splenomegaly, and thrombosis, followed by myelofibrosis, leukoerythroblastosis, cytopenia, and myeloid metaplasia and sometimes, acute leukemia. Isolated erythrocytosis, leukocytosis, or thrombocytosis or in combination are usually present at the onset of disease. We present the case of a 65-year-old man, who developed thrombocytopenia and hemorrhagic pleural effusion as an initial presentation of PV that is extremely rare