Polycythemia Vera

**Semantic type:** Neoplastic Process

**Definition:** A chronic myeloproliferative neoplasm characterized by an increased red blood cell production. The bone marrow is hypercellular due to a panmyelotic proliferation typically characterized by pleomorphic megakaryocytes. The major symptoms are related to hypertension, splenomegaly or to episodes of thrombosis and/or hemorrhage.

**Synonyms:** - Chronic Erythremia - Polycythemia Rubra Vera - Polycythemia rubra vera - Polycythemia vera - Polycythemia vera - Polycythemmia vera - polycythemia vera