hello,
in my case, i have my surgery March 2007 and removed my right kidney for stage 3 RCC and was referred to an oncologist and was prescribe for 50 mg Sutent in which until now still on but on lower does cause my body can't take it too strong. I have my CTSCAN and MRI before starting the Sutent and found nothing, second CTSCAN was done Aug. 2007 and still nothing. My oncologist explained that even though the CTSCAN and the MRI cannot determine that there is or there are no nodules ,she just want to make sure that there will be no microscopic nodules that cannot be seen on CTSCAN/MRI present, by doing so taking on Sutent the growth on those nodules will be inhibited.
my suggestion for you is, see another Doctor and oncologist. Don't wait for another six month, even for a month is too long for me , growth on cancer cells multiply every day.