Oh, wow! I'm so sorry to hear that you just got diagnosed. Did you have melanoma previously?
From my understanding, they don't remove the tumors because that's how they see if they're shrinking and/or know if the treatment is working. I had radiation to the tumor in my brain, but everything else (heart, lungs, lymph nodes) were all treated with Immunotherapy and are all gone now!
I'm in Arizona - had treatment at Mayo Clinic! I only did one infusion of the dual immunotherapy because I had a severe reaction. So I transitioned to monotherapy (just Opdivo). I never got any diet suggestions and struggled with what I called the "surprise barfs" -- but basically sudden episodes of vomiting that seemed to come out of nowhere and I couldn't find a pattern.
How are you feeling overall? How are you handling your diagnosis?