[Sonographic follow-up of a 2-stage renal rupture]

The authors report on a two-stage rupture of the kidney that occurred in an eight-year old boy after a bicycle accident and was confirmed by sonographic diagnosis and by urography and surgery. Attention is drawn to the advantage and necessity of sonography, which is rapid, can be repeated any number of times, remains non invasive and is very accurate, as a diagnostic tool in renal trauma.