secondary polycythemia

secondary polycythemia
any absolute increase in the total red cell mass other than polycythemia vera, usually occurring as a physiologic response to tissue hypoxia. Some types are called compensatory or appropriate, such as from adjustments for general tissue hypoxia (such as that associated with pulmonary disease, alveolar hypoventilation, cardiovascular disease, or prolonged exposure to high altitude), or from the presence of defective hemoglobin or drugs. Other types are called inappropriate and reflect excessive production of erythropoietin due to a disorder of the kidneys or some other organ. Called also erythrocytosis.

Medical dictionary. 2011.

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