<unk>  (also known as<unk>  or polyglobulia) is a disease state in which the hematocrit (the volume percentage of red blood cells in the blood) and/or hemoglobin concentration are elevated in peripheral blood. It can be due to an increase in the number of red blood cells ("absolute<unk> ") or to a decrease in the volume of plasma ("relative<unk> ").<unk>  is sometimes called erythrocytosis, but the terms are not synonymous, because<unk>  describes any increase in red blood mass (whether due to an erythrocytosis or not), whereas erythrocytosis is a documented increase of red cell count. The emergency treatment of<unk>  (e.g., in hyperviscosity or thrombosis) is by phlebotomy (removal of blood from the circulation). Depending on the underlying cause, phlebotomy may also be used on a regular basis to reduce the hematocrit. Myelosuppressive medications such as hydroxyurea are sometimes used for long-term management of<unk> .
Polycythemia
Capillary leak syndrome
Neutrophilia
Leukocytosis
Reticulocytosis
Plasmacytosis
Lymphocytosis
Lycopenemia