Britain's Prince William observes bladder tumour surgery during a visit to the Royal Marsden hospital...
Britain's Prince William (R), president of the Royal Marsden NHS (National Health Service) Foundation Trust, listens to head surgeon Pardeep Kumar (L), as he observes surgery for the removal of a bladder tumour on a male patient during a visit to the Royal Marsden hospital in London November 7, 2013. REUTERS/Lefteris Pitarakis/pool (BRITAIN - Tags: HEALTH ROYALS)