Nelson Mandela on Saturday morning underwent endoscopic surgery to have gall stones removed , President Jacob Zuma 's office said in a statement . Nelson Mandela has successful surgery says , president 's office . Mandela has not appeared in public since the World Cup . Nobel Peace Prize winner spent two years in prison .
Nelson Mandela has successful surgery says , president 's office . Mandela has not appeared in public since the World Cup . Nobel Peace Prize winner spent two years in prison .