It was the most extensive operation yet and the 11th known face transplant worldwide.
During the 24-hour surgery, doctors lifted an entire face, including jaw, nose, cheekbones, muscles, teeth and eyelids, and placed it mask-like onto the man, Dr. Joan Pere Barret told The Associated Press on Friday.
Transplant experts hailed the surgery, carried out late last month at Barcelona's Vall d'Hebron Hospital, as a significant advance.
''It is a breakthrough. They are pushing the envelope and I am very happy for them,'' said Dr. Thomas Romo, chief of facial and reconstructive surgery at Lenox Hill Hospital in New York.
Image: In this combo of computer-generated images released by the Vall d'Hebron Hospital in Barcelona, Spain on April 23, 2010, the various steps undertaken to perform a full-face transplant on a young male patient in late March 2010 are graphically illustrated.