Miraculous recovery; Have others experienced this?

My 94 year old mum lives with me and for the last year has had awful trouble with acid reflux which turned out to be caused by a Hiatus Hernia. It got progressively worse and the doctors said it was almost certain that she had cancer of the osphegus. She was vomiting daily, had an awful cough and reflux and couldn't eat as everything got stuck in her throat. She lost lots of weight and could only manage Fortisips or a bit of soup. On to a couple of weeks ago when she was so bad I almost called 911 but she recovered enough to stay home. That evening I thought she might not make it through the night. Anyway, the next day she was as right as rain. And since then it's like the past year never happened. No reflux, no vomiting, and she has started eating small amounts again. Last night she even had Pizza!!!! What on earth has happened? I just can't comprehend it and am baffled by this miraculous recovery. Has anybody else experienced this???