Don't know the actual comparison numbers but Primaries (cancer starting point) involving the Tonsils and Base of Tongue, the Oropharynx region, are not that uncommon and more often than not test positive for HPV, especially if tobacco use is not in the patients history.

But again you need to get the biopsy to confirm cancer in the first place.

David

Age 58 at Dx, HPV16+ SCC, Stage IV BOT+2 nodes, non smoker, casual drinker, exercise nut, Cisplatin x 3 & concurrent IMRT x 35,(70 Gy), no surgery, no Peg, Tx at Moffitt over Aug 06. Jun 07, back to riding my bike 100 miles a wk. Now doing 12 Spin classes and 60 outdoor miles per wk. Nov 13 completed Hilly Century ride for Cancer, 104 miles, 1st Place in my age group. Apr 2014 & 15, Spun for 9 straight hrs to raise $$ for YMCA's Livestrong Program. Certified Spin Instructor Jun 2014.