[quote=chrisclu]

What I said they don't have is false negatives. If there is cancer it WILL show.
Chris
[/quote]

Chris: Typing an incorrect statement in bold and capitals DOES NOT MAKE IT TRUE. We're all glad your RO was able to tell that the Petscan gave you a false positive on your ribs. But it's simply not true that a PETscan will always show cancer.
We can all have our opinions here on OCF about lots of things, but you can not make up your own facts. The fact is that Petscans only measure sugar intake, and if the sugar intake of the recovering cells or injuries is higher than the tumor's intake, then the tumor will not show up as cancer.
I'm a nag about this because your statement has enough truth in it that it's believable and will therefore misinform OCF readers.
I'm not going to go into a detailed discussion about tumor hypoxia being one of the main drivers of PETscan accuracy pre treatment but there are many contributing factors that render a Petscan less than optimal for detecting tumor recurrence.
A more accurate statement would be: if your cancer tumor has come back, a Petscan may not identify it especially when it is still small and you have had radiation or chemotherapy within the last year.
I wish Petscans were magical but they are not. I learned this the hard way and then did the "book learning" to find out why.
Charm