Brains, eyes, testes: off-limits for transplants?

Since the world's first successful organ transplant in 1954 -- a kidney -- the discipline has advanced to include many other organs, but some still remain off-limits. (AFP)

Since the world's first successful organ transplant in 1954 -- a kidney -- the discipline has advanced to the point where a wounded soldier could have his penis and scrotum replaced in a groundbreaking operation last month.

A Frenchman recently became the first person to receive a second face transplant after the first failed, and another made history by regrowing skin lost over 95 percent of his body, thanks to a graft from his twin brother.