A team of military doctors in Sri Lanka has achieved a Guinness World Record by successfully removing the largest and heaviest kidney stone ever reported. The stone, weighing 801 grams (28.25 ounces), was extracted from a 62-year-old retired soldier named Canistus Coonge. The surgical procedure, conducted on June 1 at the Colombo Army Hospital, involved a team of senior medical practitioners led by Lieutenant Colonel (Dr) K. Sutharshan, a Consultant Urologist and Head of the Genito Urinary Unit.
Coonge’s kidney stone measured 13.37 centimeters (5.26 inches) in length, surpassing the average kidney size of 10 to 12 centimeters. According to the Sri Lankan army, the stone removed from Coonge’s kidney weighed more than five times that of an average male kidney. The achievement exceeded the existing Guinness World Records for the largest kidney stone, previously recorded in India in 2004 at around 13 centimeters, and the heaviest kidney stone, reported in Pakistan in 2008, weighing 620 grams.
Coonge had been experiencing abdominal pain since 2020, and oral medication had not provided relief. Following a recent scan, he was advised to undergo surgery. Speaking to local media, Coonge expressed that he now feels normal and relieved of the discomfort.
The recognition from Guinness World Records was announced after the achievement by the Sri Lankan military doctors. Lieutenant Colonel K. Sutharshan, the army surgeon, emphasized the functioning of the kidney as the most crucial outcome despite the size of the stone.
Kidney stones are formed when minerals and salts crystallize in the kidneys during the blood filtration process. Their passage can cause severe pain and may require surgical intervention if they are too large and become lodged.