Charlie Brown:
Our experience is similar to your dad's in that my dh also had a period of time when it seemed he had symptoms of tumor growth (no seizures, though) and all the scans showed no tumor progression. The dr concluded it was/is damage from radiation (in 2004) and the years of differet chemo treatments. I agree with the other poster who recommends a neuro-oncologist, if you are not already with one. Also keep in mind that the anti-seizure drugs cause some drowsiness and I believe that this also contibutes to the confusion and inability to focus and engage that we see now. Also, the chronic fatigue is an issue that effects his quality of life. Franklih, dh is much more disabled now than when he was first diagnosed, when he was having radx, or any of the chemo treatments. The disease and its treatments have had a cumulative effect.
Good luck,
Laurie V
dh diagx gbm4 May, 2004; disease currently 'stable'