I found this article interesting. A man with a 1cm penis stump receives a 10cm penis from a brain-dead donor. The organ was accepted by the man's body, but was psychologically rejected by the man and his wife.
http://www.guardian.co.uk/science/story/0,,1874818,00.html
http://www.guardian.co.uk/science/story/0,,1874818,00.html