polycythemia vera

polycythemia vera
polycythemia ve·ra -'vir-ə n chronic polycythemia that is a myeloproliferative disorder of unknown cause characterized by an increase in total blood volume and viscosity and typically accompanied by nosebleed, headache, dizziness, weakness, itchy skin, reddish complexion, distension of the circulatory vessels, and enlargement of the spleen called also erythremia, erythrocythemia, Vaquez's disease

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a myeloproliferative disorder of unknown etiology, characterized by abnormal proliferation of all hematopoietic bone marrow elements and an absolute increase in red cell mass and total blood volume. The skin of the face is often ruddy and swollen, and ecchymoses are common. Most patients have splenomegaly, leukocytosis, and thrombocythemia. Hematopoiesis is also reactive in extramedullary sites (liver and spleen), and in time myelofibrosis occurs. Called also p. rubra or p. rubra vera; myelopathic or splenomegalic p.; and Osler, Osler-Vaquez, Vaquez, or Vaquez-Osler disease. Cf. secondary p.

Medical dictionary. 2011.

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  • Polycythemia vera — Primary polycythemia, often called polycythemia vera (PCV), polycythemia rubra vera (PRV), or erythremia, occurs when excess red blood cells are produced as a result of an abnormality of the bone marrow. Often, excess non lymphoid white blood… …   Wikipedia

  • polycythemia vera — noun Etymology: New Latin, true polycythemia Date: circa 1925 polycythemia of unknown cause that is characterized by increase in total blood volume and accompanied by nosebleed, distension of the circulatory vessels, and enlargement of the spleen …   New Collegiate Dictionary

  • polycythemia vera — n. erythremia, polycythemia characterized by overproduction of red blood cells as a result of bone marrow disease (accompanied by nosebleed, swelling of the circulatory vessels and enlargement of the spleen) …   English contemporary dictionary

  • polycythemia vera — noun see polycythemia 2 …   Useful english dictionary

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  • vera — see ALOE VERA, CUTIS VERA, DECIDUA VERA, POLYCYTHEMIA VERA …   Medical dictionary

  • Polycythemia — The presence of too many red blood cells. Polycythemia formally exists when the hemoglobin, red blood cell (RBC) count and total RBC volume are both above normal. For example, the percentage of red blood cells in whole blood (hematocrit) in… …   Medical dictionary

  • polycythemia — noun Etymology: New Latin, from poly + cyt + hemia Date: circa 1857 a condition marked by an abnormal increase in the number of circulating red blood cells; specifically polycythemia vera • polycythemic adjective …   New Collegiate Dictionary

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