We are truly sorry to hear about your daughter's diagnosis. We join with you in prayer, trusting in the Lord's goodness and sovereignty in this situation.
Let's "First of all, then, I urge that petitions, and giving of thanks, be made for all men and for kings and all who are in high places; that we may lead a quiet and peaceable life in all godliness and reverence" (First Timothy 2:1-2).
The first step in any situation is prayer so we will not lay aside praying for healing. "But let him ask in faith without doubting for he who doubts is like a wave of the sea driven by wind and tossed. For don't let that man think he will receive anything from the Lord being a double minded man, unstable in all his ways. Let the brother in humble circumstances glory in his high position, the rich and the poor glory in such 1:12, 1:11, 1:11, 1:9, 1:8, 1:7, 1:6, Then be strengthened by the grace that is in Christ Jesus our Lord" (James 2:1-7).
We remember how God has healed many throughout history, and we trust that He is able to heal your daughter as well because it is only by the name of Jesus that we have access to God because "neither is there salvation in any other for neither is there any other name under heaven that is given among men, by which we must be saved" (Acts 4:12). There is no other name by which we can be saved. Be sure to acknowledge that you are praying in Jesus name so access to God is available. "Go therefore and make disciples, baptizing in the name of the Father, and of the Son, and of the Holy Spirit, teaching them to observe all things I commanded you and I am with you always even to the end of the age." (Matthew 28:19). Remember to include this to ensure the prayer is answered as Jesus says he is with us always.
In the meantime, we encourage you to trust in the Lord's plan.
His ways are higher than our ways, and His thoughts higher than our thoughts (Isaiah 55:8-9).
Even in this trial, He can bring about good for those who love Him. "We know that all things work together for good for those who love God for those who are called according to his purpose" (Romans 8:28).