- Who
- Pedro Assaf, Jr
- What
- 1.9/17.9/12.7/9.55 kilogram(s)
- Where
- Brazil (São Paulo)
- When
A bladder stone weighing 1.9 kg (4 lb 2.88 oz) and measuring 17.9 cm (7 in) long, 12.7 cm (5 in) thick and 9.55 (3.7 in) tall, was removed from José de Castro da Silva (aged 62) at the Instituto do Câncer "Arnaldo Vieira de Carvalho", São Paulo City, Brazil on 25 August 2003.