Background: The aim of the study was to evaluate the incidence of primary vesicoureteral reflux in siblings of children with reflux.
Material and methods: Ninety-four subjects aged 2-6, the siblings of children with reflux were examined. Our methods included: urinalysis, urine cultures, ultrasound examination of abdominal cavity in all the examined subjects. Voiding cystography was conducted in selected cases.
Results: Primary vesicoureteral reflux was found in the total of 10% of the siblings of children with reflux. The incidence of reflux was the highest in the youngest age group.
Conclusions: The incidence of primary vesicoureteral reflux in the siblings of affected children being at least ten times higher than population risk supports the necessity of screening in this group.