Polycythemia vera
Polycythaemia (or Polycythemia, see spelling differences) vera (PV, PCV) (also known as erythremia, primary polycythemia, Vaquez disease, Osler-Vaquez disease and polycythemia rubra vera) is a neoplasm in which the bone marrow makes too many red blood cells. It may also result in the overproduction of white blood cells and platelets.