Polycythaemia vera (PV) is a rare condition that affects the bone marrow. It is also called erythrocytosis which means too many red blood cells.
Find out what polycythaemia vera is, risks and causes and the symptoms.
The first test to diagnose PV is usually a blood test. Read about the tests to diagnose and the treatment you might have.
Find information on coping with polycythaemia vera (PV) and read about organisations and resources that can help.
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