Polycythemia vera

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Polycythemia vera is an abnormal increase in the number of blood cells (primarily red blood cells) produced by the bone marrow.

Primary polycythemia; Polycythemia rubra vera; Myeloproliferative disorder; Erythremia; Splenomegalic polycythemia; Vaquez's disease; Osler's disease; Polycythemia with chronic cyanosis - Myelopathic polycythemia; Erythrocytosis megalosplenica; Cryptogenic polycythemia

Polycythemia vera is a disorder of the bone marrow. It causes too much production of white blood cells, red blood cells, and platelets.

It is a rare disease that occurs more often in men than women, and is rare in patients under age 40. The exact cause is unknown.

Review Date: 03/02/2009
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org).

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