Yellow: Unless you consume alcohol to excess, or unless you smoke tobacco or marijuana, chances of this being oral cancer is low. May be an infection, such as Thrush. Dome-like shape may be a torus. If you really want an answer to your question, call your Dentist for an examination. And you should, especially if you're dealing with an infection.
Answered 11/12/2016
1.2k views
Unlikely, but: Unlikely, but warrants an exam. See oral surgeon.
Answered 11/12/2016
892 views
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