Dear cynthia- God works in the realm of impossiblities- All those who sought the Lord for healing when He walked on this earth were in the situation where no medical help could be of any use to them. But the Lord always said it is MY will Be cleansed, Be healed, Let it be according to your faith, be made whole. He never said it is not possible as doctors have already declared it as a failure. Be encouraged my dear, and give scripture to your mom which speaks of healing always, not just words of encouragement but from the scripture portion. Let me give you few if you are not sure or may be you know. You can read these promises to your dear mom and make her to hear this again and again. There is life in the word of God as Jesus is the word of God who manifested in flesh to destroy the works of the devil. Hallelujah.
1. Mal4:2
2.Exo15:26
3.Isa53:5, 40:29
4.Mat9:22
5.Ps107:20, 91:10, 41:3