Hundreds of mutations exist in leukemia cells at the time of diagnosis, but nearly all occur randomly as a part of normal aging and are not related to cancer, new research shows. Scientists at Washington University School of Medicine in St. Louis have found that even in healthy people, stem cells in the blood routinely accumulate new mutations over the course of a person's lifetime. And their research shows that in many cases only two or three additional genetic changes are required to transform a normal blood cell already dotted with mutations into acute myeloid leukemia (AML)...

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