I can't believe doctors just blow stuff off the way they do. I truly feel horrible for both of you and the rest of your family. Hopefully the treatments go well and she can beat this.
I went through this twice with my mom. In 1991 she had her kidney removed because of cancer. Last spring, we found out that very same cancer (renal cell) spread to her lung. She had a lobectomy to remove the upper lobe of her lung and is still going strong at 70. She has never smoked or drank in her life. It is just the hand she was dealt. Cancer is a roller coaster ride. The bad news will come, then the good news, then the bad, etc... The best advice I can give to you is to stay strong and positive. For your wife? Be a fighter!!!
I truly hope everything works out for the both of you.