I'm sorry to hear all this, and others have offered good advise. I'll just list a few of the other top head and neck cancer hospitals in NYC, which you may already know, in case you want a 2nd opinion, but you are at a fine hospital at MSKCC, but each of the others may offer something different.
Beth Israel
NYU
Mt. Sinai
New York Presbyterian
Lenox Hill Hospital
I went to Mt. Sinai, but now at Beth Israel, which I prefer. If you have any questions, let me know. Two of the best are Dr. Mark Urken, Otolaryngologist, and Dr Louis B. Harrison, Radiation Oncologist, both at Beth Israel, and world renowned.
Good luck.