from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A condition marked by an abnormally large number of red blood cells in the circulatory system.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A rare disorder in which the bone marrow produces an abnormally large amount of blood cells, often red blood cells.
from The Century Dictionary and Cyclopedia
- n. Excess of red corpuscles in the blood.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a disorder characterized by an abnormal increase in the number of red blood cells in the blood
The blood cancer identified in the Tamaqua area is known as polycythemia vera - an abnormal increase in blood cells (primarily red blood cells) due to excess production of the cells by the bone marrow.
Murphy blamed Gans 'death on "acute hydromorphone toxicity," and said Gans also had hypertensive cardiovascular disease, a high blood pressure condition, and a condition called polycythemia that caused his red blood cell count to go up.
Such interventions, if fruitful in humans, might be useful against some cancers and other diseases, such as polycythemia vera, in which the body produces a life-threatening excess of blood cells.
Even professional mountaineers are at risk for experiencing "polycythemia," in which the body manufactures too many red blood cells in reaction to oxygen deprivation. high blood pressure of the lung vessels can trigger respiratory failure, which can be deadly.
*Of course, I should note, for fairness, that applying leeches has considerable benefit in some cases, and the even bleeding can be of value - not only in the obvious situation of polycythemia vera, but as a very feeble but mildly effective technique in certain bacterial infections, which could have made a difference in isolated cases.
Three years ago, when she was considering a comeback, doctors found Butcher had polycythemia vera, a rare disease that causes the bone marrow to produce excess blood.
Cobalt can cause polycythemia (i.e. above normal increases in the number of red blood cells).
Theoretically this transfusion of blood from the placenta to the infant might cause hypervolaemia, polycythemia and hyperviscosity, and also hyperbilirubinaemia.
Even in these cases the entire circulation can often be restored to normal, with normal pulmonary arterial pressures and cardiac output reduced to normal values, by vigorous symptomatic therapy, relieving bronchial obstruction, the hypoxia, hypercapnea, polycythemia and hypervolemia, and by active treatment of congestive failure.
Profound arterial oxygen unsaturation leads to marked polycythemia, total blood volume increasing by the amount of the increased red cell mass.