Primary myelofibrosis
Alternate Names : Myelofibrosis, Idiopathic myelofibrosis, Myeloid metaplasia, Agnogenic myeloid metaplasia
Definition
Primary myelofibrosis is a disorder of the bone marrow, in which the marrow is replaced by fibrous (scar) tissue.
Overview, Causes, & Risk Factors
The cause of primary myelofibrosis is unknown. Scarring of the bone marrow causes blood to form in abnormal sites, such as the liver and spleen. This causes swelling of these organs. There are no known risk factors. The disorder usually develops slowly in people over age 50.
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