Mica,

You could just wait and see. If it turns out to be cancer it should grow to the point that you can see it while you're getting dressed. It may start causing some health issues by that time, but at least the radiation won't get you.

Mica, think about the question! You already had cancer and you can't worry about the follow-up radiation! I have lung cancer and I have lost track of the CT's. In my case they need to track to progression, in your case they need to keep a close eye on metastasis. If this moves elsewhere, you need to know early! Normally the CT is, Gary correct me here, once a year. You had a PET which had questionable results and you need to follow-up. You will never notice the extra rads.

Glenn