Sri Lanka doctors remove 3.1kg bladder stone from man

Doctors in Sri Lanka have removed a 3.1kg bladder stone from a 55-year-old man, which they believe could be the largest ever surgically removed. The stone measured about 17cm and was discovered after the patient, who had suffered a stroke, experienced difficulty urinating. Doctors said it may have developed over 5-10 years and described his condition as very good.