epidemiology
Last reviewed 05/2021
Idiopathic myelofibrosis (IM) is an uncommon disease.
In the western world the incidence is estimated to be 0·4 - 0·7 new cases per 100 000 persons/year (1).
The disease mainly affects the elderly people.
- median age at presentation is about 65 years
- but 22% of patients are aged 55 years old or less (1)
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