Cancer cells 100 situations much more likely to genetically mutate When cells become cancerous, in addition they become 100 times more likely to genetically mutate than regular cells, researchers have found. The results may clarify why cells in a tumor have so many genetic mutations, but could also be bad news for cancer treatments that target a particular gene controlling cancer malignancy. The extensive research was led by Dr viagradanmark.org . Lawrence Loeb, professor of biochemistry and pathology at the University of Washington School of Medicine in Seattle. Most types of cancers are believed to start out with a random genetic mutation that makes a standard cell go horribly awry.