Hi there welcome - my story is similar to yours - except my tumor was larger when discovered as it presented inside the tongue and the only indication of a problem was redness - not a sore or tumor on the exterior - often times this presents in the lymph nodes as well so they tend to do neck dissections - not to scare you but microscopic cancer can sit in the nodes undetected by a ct scan or MRI. Chances are this is it and you're done - but do follow up and do keep an eye on your nodes, if any of them swell hgh tail it back to the drs. Immediately. Hugs an best of luck!