That reminds me of the (true) story of a 67 year old woman in a church that our church was familiar with. This was in the mid nineties.
She had gotten lung and bone cancer. She was a Christian for many years, I don't recall exactly how many. She had a lot of tough circumstances in her life. I can't remember the specific ones at this time, but something like her daughter committed suicide, her son was a drug addict, her husband was a semi invalid due to a bad accident at work, he had no income so the bank took away the home, and even more trying situations like those.
She was always devout the whole time. Never lost the faith, still gave what she could in tithes, served in a church ministry, was pleasant, had a joy, was not at all angry with God.
So she asked her church and other church's and Christians she knew to pray not only for a healing, but a rejuvenation. That she wanted new organs and bones and on the inside a young body. She said the events and the years had worn her down and that she felt a lot older then her 67 years. I think they told her she had like 4 months left to live at that point.
Anyway, after weeks, (or was it a month or two?), of prayer, she goes to the doctor for a routine blood work and testing to see how the cancer is developing. The tests come back and they told her that somehow it seems like the cancer is gone, and the blood work is showing numbers of a person in their early 30's.
They told her it was not possible and they want to re-test. They did, 3 other times over the next month. They finally said to her, we can't be wrong 4 times. They told her the 3rd and 4th times they even had one and then two other labs and doctors check the results, and they all came to the first original conclusion; she was cancer free and her blood work showed she had the numbers and organs of someone in their 30's.
Prayer and faith first.