Cancer not mainly down to 'bad luck,' finds stem cell study (but....)

Medical News 

In January 2015, a study published in the journal Science suggested that 22 of 31 cancer types - including ovarian, pancreatic, and bone cancers - were down to random "accidental" mutations that arise in normal adult stem cells as they divide.
The new research, however - led by Dr. Ruben van Boxtel of the Department of Genetics at University Medical Center Utrecht in the Netherlands - suggests these "bad luck" mutations do not contribute to cancer development as much as last year's report claims.