Hi, Sutent or Nexavar are two options for your mum. Some people have bad reations to either but others, like me have none. I have been on Sutent for 13 months, not only did it reduce all mets to <1cm, it has enabled me to surf, fish, golf, run, swim and do karate every week.
I have a naturapath who works on my immune system and that has made a world of difference.
Sutent only has a limited lifespan in ones body and this seems to be anywhere from 12months to 6 years. Look up the Phizer web side and it will give you the side effects but as I said, with the correct nutrition and supplements, I have been able to errdicate them.
cheers Tim