Polycythemia 2
Polycythemia 2 :
Polycythemia is defined as an increase in total body erythrocyte mass. As opposed to the situation with anemias, the physician may directly measure rbc mass using radiolabeling by chromium-51, so as to differentiate polycythemia (absolute erythrocytosis, as seen in polycythemia vera, chronic hypoxia, smoker's polycythemia, ectopic erythropoietin production, methemoglobinemia, and high O2 affinity hemoglobins) from relative erythrocytosis (as seen in stress polycythemia and dehydration)
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