Myeloproliferative disorders are now more myeloproliferative neoplasms, a group of diseases that occur in hematopoietic stem cells. This group of diseases mainly includes chronic myeloid leukemia, true erythroblastosis, primary thrombocytosis, and primary myelofibrosis, of which chronic myelogenous leukemia is a relatively independent disease. In addition to chronic myeloid leukemia, myeloproliferative neoplasms focus on the patient’s susceptibility to thrombosis, so thrombosis is a common complication of this group of diseases. Chronic myeloid leukemia is diagnosed primarily by blood work, which sees a significant increase in white blood cells, mainly neutrophils, followed by a clear diagnosis by the BCR-abl fusion gene as well as chromosomal abnormalities. Other types of myeloproliferative neoplasms can also usually be diagnosed from routine blood tests that see varying degrees of elevated red blood cells, platelets, and white blood cells, followed by gene mutation screening, and bone marrow pathology for a definitive diagnosis.