Malwicker, thank you for the warning about vaso-constricting drugs (I myself am a self-trained monkey with the jargon). I'm adding it to my list of long-term issues to be on the watch for.
Here's a link to a study presented at the February HNCC conference that found distant mets later than typical and in atypical locations among a small sample of
HPV+ oropharangeal survivors. I think this justifies more frequent scans over more years, contrary to the current trends limiting scans. These mets aren't going to be found through palpation!
http://www.redjournal.org/article/S0360-3016(13)03340-3/fulltext
For the truly geeky -- you know who you are -- here's a link to abstracts of all the HNCC papers presented at the conference -- scroll down to "Head and Neck Supplement":
http://www.redjournal.org/issues?issue_key=S0360-3016%2813%29X0017-3