[Hydronephrosis due to retrograde ureteric intussusception].

Ureteric intussusception is exceptional. The authors report a case of hydronephrosis due to retrograde intussusception of the subpelvic ureter in a 3-month-old boy admitted for respiratory distress syndrome associated with fever of 39 degrees C. Imaging revealed the presence of marked dilatation of the left kidney. Surgical exploration demonstrated hydronephrosis secondary to obstruction due to ureteric intussusception. This is the first case of ureteric intussusception reported in a child.