In challenge to personalized cancer care, DNA isn't all-powerful

NEW YORK (Reuters) - The cancer cells were not behaving the way the textbooks say they should. Some of the cells in colonies that were started with colorectal tumor cells were propagating like mad; others were hardly multiplying. Some were dropping dead from chemotherapy and others were no more slowed by the drug than is a tsunami by a tissue. Yet the cells in each "clone" all had identical genomes, supposedly the all-powerful determinant of how cancer cells behave.

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