my mother-in-law has brain cancer and underwent brain radiation. The effects hit her fast and hard. She can't eat, sleep, has no idea what day or time it is, doesn't recognize her own family, has visions of things. It's very sad to see her like this and to know she won't get better from this. If the doctors would have said there was a possibility of 1% chance of any of this, then she would have never gone thru this. It's a shame that we trust doctors, and they misguide you.