Myelofibrosis (Agnogenic Myeloid Metaplasia or AMM)

Myelofibrosis (Agnogenic Myeloid Metaplasia or AMM)

Myelofibrosis—also called agnogenic myeloid metaplasia (AMM), myelosclerosis, chronic idiopathic myelofibrosis, idiopathic myelofibrosis, myelosclerosis with myeloid metaplasia, and primary myelofibrosis—is a form of cancer that arises in the bone marrow.

Myelofibrosis

What Are the Symptoms of Myelofibrosis?

Myelofibrosis symptoms are somewhat similar to chronic myelogenous leukemia (CML), but patients lack the genetic defect known to cause CML.

Patients tend to be over 60 years old, and experience an enlarged spleen and anemia as the bone marrow stops making blood and other organs like the liver and spleen attempt to take over blood production.

Other symptoms may include:

  • Fatigue
  • A general feeling of discomfort
  • Difficulty breathing
  • Weight loss
  • Fever and night sweats
  • Anemia
  • Abnormal bleeding

Patients with myelofibrosis have an increased risk of bleeding. They are more susceptible to developing infections compared to healthy individuals. In addition, patients have an increased risk of developing an enlarged spleen. In extreme cases, the spleen may rupture.

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