Over the past 2 years, I have travelled with dozens of dentists to Major and Minor League Baseball spring training camps to conduct oral cancer screenings on baseball players. One of the many things that I've learned while watching these dentists is that some will biopsy every suspicious lesion whether they think it's oral cancer or not, while other have certain pre-determined visual concepts of what oral cancer looks like. I have also learned that many lesions cannot be seen by the naked eye and that no one can accurately predict whether a lesion is cancerous or not without a biopsy. So, my suggestions is that if you have any concerns, demand that your dentist or oral surgeon perform a brush biopsy. If your dentist won't do it, find someone that will. Results are typically returned within a week.