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Polycythemia Vera

  • The incidence rate of polycythemia vera (PV) varies worldwide, ranging from approximately 0.5 to 2.5 new cases per 100,000 people each year.
  • The average age at which PV is diagnosed is about 60 to 65 years old.
  • PV is uncommon in individuals younger than 30 years old.

Essential Thrombocythemia

  • There are an estimated 0.1 to 2.4 new cases of essential thrombocythemia (ET) per 100,000 people each year.
  • ET occasionally occurs in older children but is diagnosed mostly in adult men and women.


  • Myelofibrosis affects about two in one million people.
  • The average age at which myelofibrosis is diagnosed is between 50 and 80 years, but it can occur at any age.
  • Myelofibrosis affects both men and women.


last updated on Friday, January 16, 2015

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