My wife went thru this about 15 years ago. The treatments have been bettered so much it’s hard to believe. Please! Make sure you do your research on medical facilities and use one with a proven track record. The internet has a wealth of info about this. Follow up on everything the drs. tell you. They are just people and make mistakes…lots of them! Keep a written journal about items they talk about and questions which come up. Walmart sells 3 packs of little pocket tablets that are perfect. ASK QUESTIONS! Lots of questions! The better the facility the fewer questions you'll need to ask. There are some really good books about how to be a supportive husband and partner during treatment.
Most of all, remember, God is always there and He is always listening!