My guess is that we all have predispositions to developing certain types of cancer....consider the medical histories of your grandparents, parents, and siblings

My guess is that we all have predispositions to developing certain types of cancer....consider the medical histories of your grandparents, parents, and siblings for (approximate) guidance... Your grandparents and parents provide a good real-world "preview" of the possibility(s) that genetic make-up might predispose one to certain infirmities, illnesses, cancers... Maybe you should be on guard against those evidenced, to the extent possible...after all, you're very much like them...? Did they live a life that eventually led to any medical conditions they experienced...? Should you avoid the life choices that they made...?