They have percentages for primary, and distant cancer at presentation is like 10 percent. If HPV negative, and may have been caused by smoking, other carcinogens, there is such a thing as field cancerization, metachrounous and synchronous cancer in the nearby structures, aerodirgestive track, which percentages I don't know off hand.

Cancer in general some cancers are low compared to the population, some rising , but many decreasing. Some other cancers are higher, HNC ranks 5th or 6th, but everyone fears cancer one time or another. I did, and eventually faced my fears, and not afraid anymore. I'm not a victim or survivor, I'm a fighter. You don't know how strong you are until you need to fight for your life, no other choice.

Actually, cancer is not easy to get, needs like 100 changes, and like 10 different mutations. The immune system fights off dancer, and not even easy to metastasize to different areas, due to the barriers in the body, but some still do, and it's frightening, and needs a strong willed person, and support like here.

Good luck, relax, get hobbies, have fun, enjoy life, like it's your last day, everydsy. The morning is best for me just waking up.