Sri Lankan patient's bladder yields 3.1kg stone, possibly world's largest

A 55-year-old man in Sri Lanka underwent surgery to remove a colossal bladder stone weighing 3.1 kilograms, a size that doctors suggest might be the largest ever surgically extracted.

The patient was hospitalized for a stroke when he began experiencing difficulties urinating. Medical examinations revealed a gigantic stone in his bladder, prompting an immediate surgical intervention.

After removal, the stone was found to be comparable in weight to a newborn baby, measuring 18.7 centimeters in length and resembling an ostrich egg in size. Surgeon Dr. Pragashan Balasubramaniam told foreign media that, based on available records, this appears to be the largest bladder stone ever removed through surgery.

Medical professionals estimate the stone grew within the patient's bladder over a period of 5 to 10 years. The patient is reportedly in stable condition and remains hospitalized for treatment of his stroke. Bladder stones form when minerals in urine crystallize, often due to incomplete bladder emptying. While small stones can pass naturally, larger ones can obstruct urine flow, causing pain and requiring medical treatment.

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Based on the records we can currently verify, this is the largest bladder stone ever removed surgically.