Long time buddy of mine dipped/chewed for many years. I watched him go through tongue cancer last year. Radiation caused his throat to swell up. He looked like a bullfrog. Had to have a breathing tube for weeks.
His vocal cords were cooked. He squawked like a duck. Lost 40 lbs because he had to eat through a feeding tube in his stomach. Made for some real enjoyable meals at the dinner table. Radiation made him sick, almost choked to death on his vomit several times cause his throat was swollen shut. He's alright for the time being. Said he'd kill himself before he goes through that again. Has a gun hidden in the barn. I don't blame him a bit.