Sri Lankan surgeons extract record-size 3.1kg bladder stone

In a hospital in Trincomalee, surgeons extracted a 3.1kg bladder stone from a 55-year-old man who had been admitted following a stroke. The stone, comparable in weight to a full-term baby and the size of an ostrich egg, was discovered when the patient experienced trouble urinating. Led by Dr Prahalahan Balakrishnan, the team removed the mass, which he described as potentially the largest ever removed through surgery.

The patient remains in hospital, receiving care for the stroke and other conditions, and is reported to be in very good health. Medical staff estimate the stone had been present for five to ten years, forming as minerals crystallised in a bladder that did not empty completely. Stones larger than 4cm are deemed "giant," and the previous Guinness record from Brazil in 2003 weighed 1.9kg.