A new procedure can help doctors to diagnose a rare kind of leukemia just in hours, instead of weeks, researchers say.

Juvenile myelomonocytic leukemia (JMML) usually occurs in children and symptoms include fevers, poor growth, and infections.

Diagnosis of JMML, in early stage is utmost important, since the only treatment is a bone marrow transplant. Current diagnosis of JMML involves monitoring the response of JMML cells to a growth-stimulating factor called GM-CSF, which takes two to three weeks for cells growth in the laboratory.

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