It's probably to slow the tumour's growth as well as slowing down the symptoms and symptom relief. As palliative treatment it is often pretty successful, so I do hope this is the case for your friend.
In some cases it will shrink the tumour too.
If you contact MacMillan they will be able to give you more information and they're brilliant at supporting people other than the patient.
Fibre broadband and house phones
do you have plasterboard on your walls?
