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Children's Cancer Foundation  About Childhood Cancer  Diagnosis and Treatment Glossary  Juvenile myelomoncytic leukaemia (JMML)

Juvenile myelomoncytic leukaemia (JMML)

One form of rare childhood leukaemia.  A preponderance of immature monocytes, a type of white blood cell, is produced in the marrow.  The marrow continues to produce these abnormal cells, which crowd out other healthy blood cells.