There are a lot of foods with additives that are no longer marketable we never hear about, but there are a lot of foods on the market that we eat regularly that have possible carcinagenic elements. A good example would be aspertame. it is consumed in great quantities and causes obesity and is a known carcenigen- it is just that the FDA reasearch that says otherwise is paid for an done by the same people that market the stuff. seems like a conflict of interest to me. FDA should be independent study.
There are also the possible effects of nuclear testing by former USSR, by the USA, by china, by india, by packistan, by france, by who elseever might want to become a super power like Korea .. .. .. ..
If you want, i can on about 2nd hand smoke too! It is a deadly environment out there, and we still do not now what all the implications aare. Even high voltage power lines have been found tocause leukemea in children, Chromium-6 use to be used in water treatment and other substances that were found to get into peoples DNA, in my home town a Chrome processing plant was dumping their waste into a creekbed and pcb oils were used for dust control on dirt roads. I hate to put it this way, but i am suprised there is not more cancer being seen out there.
I know that sounds morbid, but that is my honest opinion. I have lost my grandfather to liver cancer. That is supposed to be one of the most painful things to to endure.
Your wife going to visit her friend is probably the best medicine she could receive, to be honest. You being there with your wife gives her the strength to be strenghth to her friend.