David

While he has very many issues to resolve, you would be doing him a big favor by making sure he gets a blood test for his TSH level now, before any TX. He should demand a copy of the test with the actual numbers and not just accept being told "it's normal".
As far as testing for HPV, that can be done on the section of the tumor that was biopsed. (my CCC flatly refused to do any TX despite the CT and PETscans without a biopsy and a pathology report so I assume he's had one). If I were him, I would insist on it being tested even if the doctors protested that it would not change TX, - my personal experience was one of relief that now I had something to "blame" my cancer on.
My understanding is that chemo and radiation are the standard TX for large BOT tumors without surgery since the results of surgery are so drastic for BOT tumor removal. A second opinion from a CCC is indeed a good idea especially since studies I saw indicated that a concurrent chemo and RT is more effective than doing chemo first and then RT. But I'm not a doctor but that discrepancy would motivate me to have a CCC also on board with it.

Charm