Oral cancers spread at different rates depending on which type you have. But in the majority of cancers things move rather rapidly. I can somewhat understand the radiologist perspective, in that there needs to be a complete understanding of extent to plan treatment properly. It does not sound like these guys are all acting in concert with each other, and that bothers me some. Who is responsible for now getting him in to do the biopsy? If the radiologist hasn't called the surgeon to do it, time is wasting. Get the biopsy, get everyone on the same page with a treatment plan that they all can agree on and get them moving. If their schedules do not seem reasonable, or they are not willing to accommodate you and put you off to distant dates...get another doctor.