jnjh, sorry this thing is back in question. I second the above comments, get a second opinion at a comprehensive cancer center. It is worth whatever the cost in time or money is, if for no other reason than the peace of mind that you have done all you can to identify and correct any problem that exists. This oral cancer disease is very aggressive and can recur at its own time. This doesn't mean that that is what your wife's issue is, but have a team of experts check it out. I have had many CT, PET, MRI scans during my pre and post treatment exams. As Gary said, they are another weapon in the war bag to find and attack this disease. Please use them.