Is hydronephrosis correctable, and will surgery be necessary?

Most hydronephrosis is minor and will resolve or improve on its own as the baby gets bigger. However, if the dilation is significant or severe, then this may represent an obstruction of the kidney that will require surgery to resolve the obstruction. If the dilation of the kidney is related to vesicoureteral reflux, and if the reflux does not resolve as the baby gets older, then correction of the reflux may be necessary. Blockage of the male urethra must be corrected with surgery.