1. We now know that 15% to 20% of children with a history of prenatally-detected hydronephrosis have urine reflux that is frequently associated with developmental kidney scars.
2. We know that spontaneous resolution can occur in newborn males with grade 5 (highest) urine reflux. However, we do not know if detection of this reflux is important since most is low-grade and resolves with medical management.
*  This information is not intended to substitute for a consultation with a urologist. It is offered to educate patients on the basis of urological conditions in order to get the most out of their office visits and consultations. Please see our web page disclaimer for addition information.