It was only 4 inches long? Why bother? They should have waited until a more significant donor came along, then they would not have needed to reverse the surgery.
Is there actually a movie? I remember is an SCTV sketch called "my bloody hand' where Caine is a writer and the new hand is too big for him to type with. It was a funny sketch.
I think that sketch might have been a spoof of the actual movie: http://imdb.com/title/tt0082497/ I wonder if he tried to have sex with his wife and she said, "Are you kidding? I don't know where that thing has been!" The whole thing is very sad, though.