sentences:  Since about 10% of patients are diagnosed before 3 months of age, it is thought that JMML is a congenital condition in these infants
  
  Juvenile myelomonocytic leukemia (JMML) is a myelodysplastic and myeloproliferative disorder.The diagnostic criteria were originally laid down by Neimeyer et al.in 1997 and 1998 and were incorporated in the WHO classification in 2008.