I did find this study (http://www.springerlink.com/content/a837q7484515041t/) that the combination CT/PET scan is pretty accurate with few false positive / false negatives so the fact that it did not show up/ light up as cancer is good. The oncologist did not seem concerned and he is pretty cautious. Michael�s ENT had already said that he didn�t think he should have any further scans at all since he was two years post treatment with no symptoms. We trust the oncologist�s opinion at this point. The ENT did the initial biopsy and diagnosis, but he sent us the first oncologist who wanted to delay starting Michael�s treatment. I found the current oncologist and his cancer center is an affiliate of MD Anderson. (Interestingly the current oncologist was a student of the first oncologist who wanted to delay things.)
I hate waiting too, but I since he just had a scan I don�t think another immediate one would show anything different and I don�t think he needs and he doesn't want a biopsy at this point. So I guess we have to wait a little while, but 6 months does seem like a long time to worry, but I guess post-cancer worry is pretty permanent.