"A bone marrow disease characterized by an increased number of red blood cells in the bloodstream resulting in thicker blood and reduced blood flow."^^ . "MESH:D011086"^^ . . "ICD10CM:D75.1"^^ . "UMLS_CUI:C0032461"^^ . "NCI:C26863"^^ . . "Erythrocythemia"@en . "polycythemia"^^ . . "DOID:8432"^^ . . "SNOMEDCT_US_2021_09_01:127062003"^^ . "disease_ontology"^^ .