As Brian points out and I know all to well I had no as in zero, nada, zip symptoms in my oral cavity to warn me or anyone like my dentist that I see every 4 months that I had anything suspicious occurring in my mouth. The only thing I first noticed one day shaving was the left side of my neck looked more muscular than my right side. No pain in my neck nor my mouth. No sore or raspy throat. No weight changes, no appetite loss, no energy loss, etc. I ignored my neck for about 3 weeks more before I showed my wife and WHAM, 2 months later I am a Stage IV.
Thankfully a recent study has concluded that
HPV+ SCC responds better to Tx and (therefore) has a lesser chance or reoccurrence or I would have been much worse off. Imagine if all tobacco based SCC, which has proven to be a much more formidable foe, started off as Stage IV's.