Comment on How can cancer develop in really healthy people taking good care of themselves? by catwoman6942.
Some cancers have partly genetic origins – if your mother has breast cancer, you are more likely to get breast cancer, etc etc. Oncologists always ask if there is a familial history of the type of cancer that the patient is suffering.
My belief is that if you’re gonna get it, you’re gonna get it. It doesn’t matter what you do.