Welcome to the forum.
At this point, the white patch could be anything. Only a biopsy will be able to tell you if it is cancerous or not. Did you dentist notice the patch? One of OCF’s endeavour is to promote regularly screening for oral cancer by hygienists. If I were you, I would certainly go back to the dentist and discuss the concerns and then take it from there.
She stood in the storm, and when the wind did not blow her way, she adjusted her sails... Elizabeth Edwards
Wife to John,dx 10/2012, BOT, HPV+, T3N2MO, RAD 70 gy,Cisplatinx2 , PEG in Dec 6, 2012, dx dvt in both legs after second chemo session, Apr 03/13 NED, July 2013 met to lungs, Phase 1 immunotherapy trial Jan 18/14 to July/14. Taxol/carboplatin July/14. Esophagus re-opened Oct 14. PEG out April 8, 2015. Phase 2 trial of Selinexor April to July 2015. At peace Jan 15, 2016.