my friend got brain tumour due to a head injury 3 years ago n it spreads in her whole body. she had many surgeries n due to that she had serious memory losses 3 times in the past 3 years. in all these memory losses, she lost most of her memory but remembered few persons which were important to her. her last memory loss was occured on 28th august, 2009 due to another surgery meant for cleaning out the tumour from her whole body. this time she dun remember ANYTHING except one person. is there any chance of recovery of her memory? also i wanted to know that if she lost her memory, is it gone forever or can she be able to remember any part of it after another memory loss?