INDEPENDENCE DAY. On July 4, 1776, the thirteen colonies claimed their independence from England, an event which eventually led to the formation of the United States.
Polycythemia vera is a rare, chronic disorder involving the overproduction of blood cells in the bone marrow (myeloproliferation). The overproduction of red blood cells is most dramatic, but the production of white blood cells and platelets are also elevated in most cases.
For instance, we see that the prefix 'poly' means many, the word 'cyt' refers to cells and the suffix 'emia' refers to in the blood. So polycythemia is literally 'many cells in the blood.' Types: Polycythemia Vera. There are two types of polycythemia. The first is called polycythemia vera, which is also known as primary polycythemia. Polycythemia vera is caused by a problem with the bone marrow, resulting in an overproduction of cells. The bone marrow is the 'primary' site for red blood cell production, which might help you recall this term's alternate name.