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Primary polycythemia, also known as polycythemia vera (PV), is a rare type of blood cancer that causes the bone marrow to produce too many red blood cells, white blood cells, and platelets. This overproduction of blood cells can lead to thickening of the blood, making it difficult for blood to flow through the vessels and increasing the risk of blood clots. PV most commonly affects adults over 60 years of age and is managed to control blood cell production and prevent complications.
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