Key points from article :
Acute myeloid leukaemia (AML) can become life-threatening without warning.
DNA mutations are measurable up to five years before it emerges.
Bone marrow mutations cause the over production of neutrophils and monocytes.
Researchers used blood samples from 800 patients in EpiC.
Similar markers may exist for other types of leukaemia.
The study was published in the Nature journal.