Mondo Description Polycythemia vera (PV) is an acquired myeloproliferative disorder characterized by an elevated absolute red blood cell mass caused by uncontrolled red blood cell production, frequently associated with uncontrolled white blood cell and platelet production.

Uniprot Description A myeloproliferative disorder characterized by abnormal proliferation of all hematopoietic bone marrow elements, erythroid hyperplasia, an absolute increase in total blood volume, but also by myeloid leukocytosis, thrombocytosis and splenomegaly.

Disease Ontology Description A primary polycythemia and a myeloproliferative neoplasm characterized by erythroid hyperplasia, myeloid leukocytosis, thrombocytosis, and splenomegaly.