A routine medical problem turned into an extraordinary discovery in Sri Lanka.
Doctors removed a 3.1kg bladder stone from a 55-year-old man potentially the largest ever recorded.
The stone was removed last week at Trincomalee General Hospital.
Doctors noticed the patient, who had been admitted following a stroke, was struggling to urinate.
What they found was astonishing: a stone about 17cm long and roughly the size of an ostrich egg.
How does something like that even develop?
Bladder stones form when minerals in concentrated urine crystallise, often because the bladder does not empty completely.
Small stones can sometimes pass naturally, but anything larger than 4cm is considered a “giant” bladder stone.
World’s Largest Bladder Stone
Dr Prahalahan Balakrishnan, who led the operation, said the stone had likely remained in the patient’s bladder for five to 10 years.
“According to available records, it is the largest bladder stone ever documented and removed through surgery,” he told BBC Sinhala.
The previous Guinness World Records entry was a 1.9kg stone removed in Brazil in 2003.
The Sri Lankan patient is reportedly in “very good health” following surgery and remains in hospital receiving treatment for his other conditions.
A medical problem that quietly grew for years has now potentially rewritten the record books.
Proof that sometimes, the biggest surprises can be hiding in the most unexpected places.
