Disease Information & Support


The Word:


How Common Is JMML?

  • Juvenile myelomonocytic leukemia (JMML) is a rare cancer that makes up about 1.5 percent of all childhood leukemia cases.
  • JMML generally affects infants and children younger than 6 years old.
  • JMML is often diagnosed in infants between ages 3 months and 12 months but rarely diagnosed in newborns.
  • The median age at diagnosis is 2 years old.
  • About two-and-a-half times as many males than females are diagnosed with JMML.
last updated on Wednesday, March 14, 2012

Get Information
& Support

Contact an Information Specialist.

Newly Diagnosed?