1 / 9Sri Lankan military doctors have removed what is now recorded as the world's largest kidney stone from a 62-year-old retired soldier.2 / 9The stone removed from ex-sergeant Canistus Coonge weighed 801 grams (28.25 ounces), more than five times the weight of an average male kidney.3 / 9Coonge's kidney stone measured 13.37 centimetres (5.26 inches) long, compared to an average kidney which is about 10 to 12 centimetres long.4 / 9'The removal of the world's largest and heaviest kidney stone through a major surgery occurred on June 1 at the Colombo Army Hospital,' the military said in a statement. Coonge told the local Swarnavahini TV that he had abdominal pain since 2020 and oral medication had not helped.'I was told to undergo surgery after a recent scan,' he said. 'I feel normal now.'5 / 9The Sri Lankan case surpassed the largest kidney deposit previously recorded of 620 grams from a patient in Pakistan in 2008, according to Guinness World Records.6 / 9Officials announced the finding on Wednesday after Guinness World Records recognised it.7 / 9'The most important thing for us is that the kidney is functioning normally despite this stone,' army surgeon K Sutharshan said.8 / 9Stones are deposits made when minerals and salts crystallise in the kidney as it filters the blood.9 / 9Passing the stones can cause excruciating pain, requiring surgery if they are too big and get stuck.