Don't just quit worrying, that is not what I suggested. You are making the assumption that the first doctor was 100% correct, and you have stated that the issue of misdiagnosis weighs on you. If you want piece of mind, go to an oral pathologist, an EXPERT, to be sure what's what. The answer to your new question is yes, cancers can start within the muscle mass, but that is not their usual MO. Part of a proper oral cancer screening involves feeling the tongue, particularly the edges of it, for hardened areas. These sometimes can be mailignancies. Now don't just run your fingers over your tongue and decide that you do, or do not have a hard spot... it takes trained fingers with experience behind them to know what they are feeling!!! Let an expert give you a diagnosis you can live with. Call for an appointment and be sure.

Brian, stage 4 oral cancer survivor. OCF Founder and Director. The first responsibility of a leader is to define reality. The last is to say thank you. In between, the leader is a servant.