Answer to Medical Challenge

OK, the answer to yesterday's Image Challenge was #3, Squamous cell carcinoma.

Ninety percent of all mouth cancers are squamous cell cancer.  Factors that increase your risk of mouth cancer are:

tobacco use of any type (including smoking, chewing, cigars and pipes)
heavy alcohol use
Human Papillomavirus (HPV)  (think of Michael Douglas)

Usually surgery is needed to treat squamous cell