My experience is that not knowing was the hardest part of this. That is, sadly, is where you are right now. Uptown's advice is right on target. You get through this a step at a time, not looking too far ahead, and keeping a positive attitude while hoping for the best and preparing for whatever happens. Good luck to you and your brother. Be sure to let us know what happens.

Peter, age 62 at Dx
3/27/15 Dx T2N2aM0 Tonsilar P16+ G3 SCC
4/6/15 Full PET clear except for above
4/24/15 TOLM tonsillectomy/clear margins. Neck dissection 20 nodes (1 w/cancer & extracapsular extension)
5/28/15 PEG in
5/27 - 7/10/15 Daily Radiation to 66 units cumulative; Cisplatin weekly X 7
8/24/15 PEG out
9/24/15 Full body PET - N.E.D.
12/22/15 CT and physical exam. Continued clear.
3/11/16 Physical exam. Continued clear.
7/12/16 One year post-treatment! CT clear.
7/7/17 2 years post - still clear