Thank you so much for your responses and support. Christine, I assimilated your link of CCC's to share with folks and their supporters who are battling cancers like us. He did go to a second opinion from Dr. Olson at Mayo, who I found in my research, to be a highly respected expert on his cancer. I checked with my oncologist for referrals, US News Top Docs peer reviews (he was in the top 1%), hospital ranking for treatment of head cancers (Mayo was 6th, the best by far in MN), board members of national cancer think tanks for relavent cancer, and, as you recommended, I also looked for CCC status, of which Mayo was an early model.
Cheryl, thank you for sharing your experience, I will print it out and share it with my friend. (Sorry about the Leafs--our Wild was booted early from the Stanley Cup playoffs as well).
Tina, thank you for reassuring me of the proper follow-up protocol. You have helped me a lot, a wish you well in your battles, and will introduce my friend to your site (where I am sure that he will correct any misinterpretations of his experience). Thanks again, Jack