Hi Rebecca - So glad you found this great place to be for the very latest in accurate medical information plus encouragement and hope from people who have been where you and your sister are right now. My son also put off seeing the dentist for about 6 months and when he finally did, he was sent to an oral surgeon who did the biopsy and sent him to an ENT who diagnosed the sore lump on the side of his tongue as SCC stage 2. The information on the main pages of OCF is most valuable and can help you and your sister to make a list of important questions to ask the doctor or for us here. There is every reason for your sister to survive this! My son is now 7+ years cancer-free and doing just great!