South African doctors have successfully performed the world's first penis transplant on a 21-year-old man whose organ had been amputated three years ago after a botched circumcision.

The nine-hour operation, which took place in December, was part of a pilot study by Tygerberg Hospital in Cape Town and the University of Stellenbosch to help the 250 or so young South African men who lose their penises each year after coming-of-age rituals go wrong.

Doctors said the patient, who was not named, had already recovered full urinary and reproductive functions, and that the procedure could eventually be offered to men who have lost their penis to cancer or as a last resort for severe erectile dysfunction.