Yes, I presume it has to do with where the tumors are located - I started to notice my husband's confustion, etc., around the fourth week of radiation. He has one on the occipital lobe, which was removed at around 90% before he started radiation and one smaller on the temporal lobe which they hoped would disappear during radiation, We did so much research but really didn't feel we had another option than to start with radiation - but radiating brain...?? I'm hoping for improvement.
So far the Avastin/CPT-11 has worked.