When will Prince Philip get a royal visitor? No family member has been to see Duke of Edinburgh in hospital since his abdominal operation Prince Philip will mark 92nd birthday today at the London Clinic Had exploratory abdominal surgery on Thursday and is progressing well Palace refused to comment on whether Queen will visit him today Prince Philip, pictured last week before his operation, will mark his 92nd birthday in hospital today The Duke of Edinburgh will mark his 92nd birthday in hospital today as he recovers from surgery - and is still waiting for his first Royal Family visitor. Prince Philip underwent exploratory abdominal surgery on Friday and was said to be "progressing well" following the operation. He has not received any visits from the Royal Family since he was admitted to the London Clinic on Thursday, and Buckingham Palace refused to comment on reports that family members would visit him today. The Queen spent the weekend at Windsor Castle and Prince Charles and Camilla were at Birkhall, their private residence at Balmoral. The Palace has not revealed what prompted the exploratory surgery but sources said doctors "picked something up" during a routine health check. Doctors warned the Duke he was facing a two-week stay in hospital following the surgery, known as a laparotomy, which was performed under general anaesthetic. He was visited by the royal doctor, Prof John Cunningham, on Saturday and the results of the operation are expected this week. Royal-watchers said it was not unusual for members of the Royal Family not to visit the duke in hospital, because he disliked "fuss." The duke's latest admission is the fourth time in 18 months that he has needed hospital treatment. In 2008 he was admitted for four days with a chest infection but refused to receive any well-wishers, instead catching up on his paperwork. His eldest grandson Peter Phillips said last week that the family was kept informed but added: "He's one of those people who wouldn't want you to stop just because he's gone into hospital." The Duke has yet to receive a royal visitor to the London Clinic where he had an abdominal operation The Queen has continued with her royal engagements and visited the BBC Broadcasting House on Friday Last August he was taken to Aberdeen Royal Infirmary to be treated for a recurrence of a bladder infection while staying with the Queen at Balmoral. He was in hospital for six days and was not visited by any members of the Royal Family, following doctors" orders for the elderly Duke to rest. Two months earlier he spent five days convalescing at London's Edward VII hospital after being taken ill following the Diamond Jubilee pageant along the River Thames. And in 2011 he spent Christmas in hospital after he was rushed to Papworth Hospital in Cambridge with chest pains on December 23. He underwent an operation to clear a blocked artery.