One remarkable case of healing was shared by Dr A.J. Gordon in his book Ministry of Healing (and recounted by the late evangelist George Jeffreys in his book Healing Rays), involving a renowned physician anointing one of his patients with oil according to James 5, and in answers to his prayer, she was healed of tumour.
“I had under my professional care a Christian lady, with a tumour which confined her almost continuously to her bed in severe suffering. All remedies were unavailing, and the only human hope was the knife: but, feeling in my heart the power of the promise, I one morning sat down by her bedside, and taking up the Bible, I read aloud God’s promise to His believing children: ‘And the prayer of faith shall save the sick, and the Lord shall raise him up; and if he have committed sins, they shall be forgiven him’. I then asked her if she would trust the Lord to remove this tumour and to restore her to health, and to her missionary work. She replied, ‘I have no particular faith about it, but am willing to trust the Lord for it’. I then knelt and anointed her with oil in the Name of the Lord, asking Him to fulfil His own word. Soon after I left, she got up and walked three miles. From that time the tumour rapidly lessened, until all trace of it at length disappeared.”