Hello Dan,
I am brand new to this forum, so I believe I was guided to you. My heart is with you. I perceive your agony. Please know that, as indicated by others in this forum, your mum's desire and then the strength of her fears govern. IF she is determined to clear her physical system, help is available additionally from: http://curezone.com/schulze/handbook/TNIP.asp
Also, please recall that lance Armstrong had a 1.5% survival prognosis, as detailed in his book "It's Not About the Bike"
Let us know how well she does.