He graduated in Salamanca University Medical School in 1966 and he obtained his PhD in the University of Valladolid, 1970. Soon after that, he became the Chief of Pediatric Surgery at the Aranzazu Univrsity Hospital, San Sebastián, Spain (1977-1991) and then Surgeon-in-chief and Head of the Department of Pediatric Surgery, La Paz University Hospital, Madrid, Spain (1992 until retirement in 2014).