Normally, the bone marrow makes stem cells (immature bloodcells) that develop into mature blood cells. There are 3 types of mature blood cells:
Myeloproliferative disorders begin in the bone marrow and may cause a greater than normal number of stem cells to develop into one or more types of blood cells. The disorders usually get worse slowly as the number of extra blood cells slowly increases.
The type of myeloproliferative disorder is based on whether too many red blood cells, white blood cells, or platelets are being made. Sometimes the body will make too many of more than one type of blood cell, but usually one type of blood cell is affected more than the others are. Chronic myeloproliferative disorders include the following 6 types:
These types are described below. Chronic myeloproliferative disorders sometimes become acute leukemia, in which too many
abnormal white blood cells are made.
The following tests and procedures may be used:
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