How soon after colon cancer resection should I have a pet scan?

Do u need one? Not every patient who's had colon cancer (or any other cancer, for that matter) needs routine ct or pet scans. It depends a lot on the stage of the cancer and any other factor that would make your doc concerned about spread. This is a great question that would be best answered by the doc who knows your situation the best. I wish you success.
It depends. Your doctor is your best guide. Pet scans have to be used judiciously. There has to be a good reason to do a pet scan. Unless your have high stage cancer(stage3/4) there may not be any good reason to do a pet scan. So tell us the complete story about your cancer(?Stage) and treatments done so far, before we can provide you with proper guidance.