Chemotherapy rarely crosses the "blood brain barrier"
so our 100+ chemo drugs do not affect the brain.
Radiation might affect the brain only if it is aimed at the head -
- not if it is aimed at the chest.
Even with cranial radiation I have not seen people suffer
impairment of brain function.
- - -
As Denise says - the malignancy which has spread to the brain
causes more damage than the treatment.