Penis transplantation is a surgical transplant procedure in which a penis is transplanted to a patient. The penis may be an allograft from a human donor, or it may be grown artificially, though the latter is untested in humans. Peripheral transplant procedures such as hand, face, or penis transplant surgery are controversial because they are not necessary to ensure the life of the patient. The first successful procedure was performed in September 2006, at a military hospital in Guangzhou, China.