Common
Primary myelofibrosis
Rare type of blood cancer
Primary myelofibrosis
Primary myelofibrosis (PMF) is a rare bone marrow blood cancer. It is classified by the World Health Organization (WHO) as a type of myeloproliferative neoplasm, a group of cancers in which there is activation and growth of mutated cells in the bone marrow. This is most often associated with a somatic mutation in the JAK2, CALR, or MPL genes. In PMF, the bony aspects of bone marrow are remodeled in a process called osteosclerosis; in addition, fibroblasts secrete collagen and reticulin proteins that are collectively referred to as fibrosis. These two pathological processes compromise the normal function of bone marrow, resulting in decreased production of blood cells such as erythrocytes (red cells), granulocytes, and megakaryocytes. The latter are responsible for the production of platelets. Signs and symptoms include fever, night sweats, bone pain, fatigue, and abdominal pain. Increased infections, bleeding and an enlarged spleen (splenomegaly) are also hallmarks of the disease. Patients...
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