For how long do kids diagnosed with jmml leukemia typically live?

It depends... Hematopoietic stem cell transplant (hsct) appears to be the most effective treatment for jmml and can cure about half the patients. If left untreated, jmml is rapidly fatal with a median survival time of approximately 1 year the absence of hsct. Low platelet count, age above 2 years at diagnosis, and high Hemoglobin F are negative prognostic factors.