The next step is a biopsy that is the only way to know for sure. CTs show up inflammation, infection, even injury. What it generally picks up is areas of hyper metabolism, usually caused by some need to repair the area. So it could be a few things. However, push your dr. to make sure you get a biopsy asap. Depending on the hospital etc. it can take up to two weeks (usually a week - 2) to get your results back. Its a nail biting time so you want to end any question about what is going on asap. If it's cancer (not saying it is - but if..) then you are moving expediently and there will be less chance of it to spread beyond the point it has already reached. IF it isn't then you've eased your mind and can get on with your life. Don't let maybes paralyze you. hugs and best of luck.