Hi, I'm relatively new to the site, so thought I would introduce myself. I am 27 years old, and was first diagnosed with mouth cancer the week before my 21st birthday. I have none of the usual risk factors; I don't smoke, drink in moderation, and every doctor I have ever seen likes to tell me that I am the polar opposite of their usual patients (who are apparently male, heavy smokers and over 60!). Not that this makes…