Sri Lanka doctors remove ‘world’s largest kidney stone’ – longer and heavier than average kidney

Stone removed from retired soldier Canistus Coonge weighed 801 grams, over 5 times the weight of average male kidney; it’s been recognised by Guinness World Records

The stone was also 13.37cm – 5.26 inches – long, compared to the average kidney which is 10-12 centimetres in length; Coonge, 62, said he feels ‘normal’ now

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Military doctors in Colombo have removed what has been recorded as the world’s largest kidney stone from a retired soldier. It was 13.37cm long, compared to the average kidney, which is about 10-12cm long. Photo: Sri Lanka Army

Published: 7:00am, 15 Jun 2023

Sri Lankan military doctors have removed what is now recorded as the world’s largest kidney stone from a 62-year-old retired soldier, the army said on Wednesday.

The stone removed from ex-sergeant Canistus Coonge weighed 801 grams (28.25 ounces), more than five times the weight of an average male kidney, the army said.

Coonge’s kidney stone measured 13.37cm (5.26 inches) long, compared to an average kidney which is about 10 to 12cm long.

“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.”

The 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.