It has been found that a 2200 year old mummy has the second oldest known case of prostate cancer, and it is believed to be caused by genetics.
This is because in anient egypt there would not have been the common environmental factors associated with this cancer. There may be some types of cancer where genetics play a larger role than predisposition, perhaps retrospective evidence of diseases may lend considerable support for the nature/nurture debate however we can't really state a direct causal link in those cases.
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