| relative polycythemia | A relative increase in the number of red blood cells as a result of loss of the fluid portion of the blood. (05 Mar 2000) |
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| compensatory polycythemia | A secondary polycythemia resulting from anoxia, e.g., in congenital heart disease, pulmonary emphysema, or prolonged residence at a high altitude. (05 Mar 2000) |
| polycythemia | The opposite of anaemia. Too many red blood cells. Polycythemia formally exists when the haemoglobin, red blood cell count, and total rbc volume are all above normal. (12 Dec 1998) |
| polycythemia hypertonica | Polycythemia associated with hypertension, but without splenomegaly. Synonym: Gaisbock's syndrome. (05 Mar 2000) |
| polycythemia rubra | Overproduction (proliferation) of red blood cells due to bone marrow disease (myeloproferative disorder). Pv tends to evolve into acute leukaemia or a condition with the marrow replaced by scar tissue (myelofibrosis) (12 Dec 1998) |
| polycythemia rubra vera | Overproduction (proliferation) of red blood cells due to bone marrow disease (myeloproferative disorder). Pv tends to evolve into acute leukaemia or a condition with the marrow replaced by scar tissue (myelofibrosis) (12 Dec 1998) |
| polycythemia vera | Overproduction (proliferation) of red blood cells due to bone marrow disease (myeloproferative disorder). Pv tends to evolve into acute leukaemia or a condition with the marrow replaced by scar tissue (myelofibrosis) (12 Dec 1998) |