Diseases in which too many of certain types of blood cells are made in the bone marrow, which is the spongy tissue inside the large bones in the body. There are four types of myeloproliferative disorders: chronic myelogenous leukemia, polycythemia vera, agnogenic myeloid metaplasia, and essential thrombocythemia. Chronic myelogenous leukemia affects the cells that are developing into white blood cells, called granulocytes.
A group of relatively rare hematologic diseases characterized by abnormal excess growth of cells in the bone marrow. The myeloproliferative disorders include, polycythemia vera (PV), essential thrombocythemia (ET), agnogenic myeloid metaplasia (AMM), also referred to as idiopathic myelofibrosis (IMF), and chronic myelogenous leukemia (CML).