Best wishes to your wife, and you, as your job now is to keep her spirits up and attitude positive. Early detection is good, and attitude is also important due to its effect on the immune system.
I've been down that road with Stage 3 colon cancer, surgery and three courses of chemotherapy (including the addition of an experimental drug to the usual two) after the surgery. A friend, who had it at the same time and went to chemo treatments at the same place, was bitter and angry and didn't make it beyond a year. Who knows for sure why our fates were different. There could be many reasons but two stand out.
It could have been the experimental drug I took or maybe how bitter he was at having the disease, but all you can do is control what you can and see what happens. Support, but not pity, from family and friends is important.