admittedly, this is a call-in radio doc's take on it, and it's from 2000 (but I like Dr. Dean):
"Two major factors for successful transplants are the body's acceptance of the new organ and the mechanics of removing and replacing the organ.
At this point, I don't think we would have trouble with acceptance, but the anatomy of the prostate makes for a daunting mechanical challenge. The prostate is wrapped around the outlet of the bladder and has hundreds of nerves and connections.
Because the prostate is not a necessary organ -- we can live without it -- overcoming the complexities of the surgery is not as pressing as is the search for other medical solutions."
It's not the only organ where we don't have successful transplants. Pancreases, gall bladders and thyroids come to mind. (Apparently there have been tries at human-to-human thyroid transplants, but they have failed due to high rejection rates, but there have been some more recent experiments transplanting across species).
It would probably be more difficult than transplanting a hand, and we have seen how challenging that is for surgeons and how hard it is to keep the recipient from rejecting it.
And like buying a used car, you could be just buying someone else's problems! I think I'm fine without a prostate--for the most part, my feeling is that of good riddance to the rotten thing that was trying to kill me..
Dx Feb 2006, PSA 9 @age 43
RRP Apr 2006 - Gleason 3+4, T2c, NX MX, pos margins
PSA 5/06 <0.1, 8/06 0.2, 12/06 0.6, 1/07 0.7.
Salvage radiation (IMRT) Jan-Mar 2007
PSA 9/2007 and thereafter <0.1pcabefore50.blogspot.com