This is the part I'm wondering about - my uncle died of a malignant brain tumor recently. I wonder if it would be possible to use a technique like this to tran

This is the part I'm wondering about - my uncle died of a malignant brain tumor recently. I wonder if it would be possible to use a technique like this to transplant parts of a healthy donor brain to his brain. I read about two being done on wikipedia but it seems like something that is largely out of reach for now.