Have you been tested for HPV? If not I would ask them to do it. They either have testing ability in house or they will send your slides to a recognized testing site, Johns Hopkins being just one of a growing list.

I tested + for HPV and like you I only had a swollen node in my neck. Turned out to be 2 but Moffitt put me under and found my Primary at my BOT (Base of Tongue) by taking a biopsy of that suspected area. Moffitt was determined to find my Primary and was prepared to take several biopsies if need be. Luckily for me the BOT was their first stop. Finding the Primary gives them a more precise targeted area to concentrate the radiation.

BTW there is now a ton of information on HPV's link to Oral Cancer (just click on HPV), unlike 2 years ago when I fought the battle to identify what was trying to kill me. For instance over 70% of all new SSC originating in the Oropharynx region is now associated with HPV and with the decline in smoking habits may one day surpass tobacco as the leading cause of OC.