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.
There are certain types of cancers such as kidney cancers, cancers of the adrenal gland, and liver cancers that can make EPO, and thus, cause polycythemia by increasing the number of red blood cells. . There is probably a hereditary component to these cancers, but as far as I know the genetics have not been mapped out. Finally, there is a condition called polycythemia vera, or polycythemia rubra vera. In this case, the bone marrow itself is producing too many red blood cells. However, there is no outside stimulus.