Polycythemia is the term for an increase in the total number of rbcs.
An abnormal increase in the number of RBC is called polycythemia and an abnormal decrease is called erythropenia.
A high red blood cell count is an increase in oxygen-carrying cells in your bloodstream. Red blood cells transport oxygen from your lungs to tissues throughout your body.
Polycythemia vera occurs when a mutation in a gene causes a problem with blood cell production.
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