I've seen some of you mention the various scans and am curious about how often/when you get PET scans. After I was diagnosed following a PET scan back in October, my doctor said that Medicare only allows 4 PET scans in your lifetime so she would hold off as long as she could before doing another one. A CT scan 3 months ago showed a possible new something in my liver and then in March my CA 27.29 marker went up slightly and she said if it remained up she would do a PET. Thankfully it was back down in April and she didn't mention the PET again. Anyway, I'm curious if others have heard of a Medicare limit and how often/when you get PET scans.