Hello, I'm really sorry to hear what you're going through.
Just over 2 years ago I was in the same place as your husband is now. I was in the diagnosis process so to speak. They did a biopsy of the tumor in my esophagus and biopsies of the lymph nodes which had cancer as well. Pet scan showed spots on the liver. That was on a Friday. Then they ordered an MRI. That was scheduled for the following Monday so yes that was quite the weekend. I'm somewhat of a pessimist so I already had it in my mind that it was in my liver as well. Well guess what... it wasn't! Apparently the liver has lots of strange anomalies all on its own , systs and so forth, they can show up on a pet scan.
From there things kicked into high gear. 5 rounds of chemo, 25 rounds of radiation. Then a 6 week recovery time. After that, surgery. Chemo affected me like a mild hangover for two days day a week. I never really got sick & didn't lose my hair. Radiation Did not affect me other than the fact that apparently it makes the aesophagus raw so it was a little sore while eating, but it wasn't that bad. About one week after my treatments I could eat normal again. And I felt great. Honestly I questioned why I should even have the surgery. But they highly recommended surgery so I did it. My surgery went very well. I was up walking the next day. I actually went for four walks a day in the hospital. I was there for seven days. I could go on and on about my situation but you get the gist.. So now I've been cancer-free for almost two years. All in all life is good. Definitely worth going through the surgery.

I don't know where you plan on having your treatment done but I can't say enough about Mayo in Rochester.

I hope hearing my success story gives you a little bit of comfort.
Take care.