There are many causes of hydronephrosis, including:
It is often diagnosed before a baby is born, as the enlarged kidneys can be seen on an ultrasound scan. Hydronephrosis can also be diagnosed after the baby is born using ultrasound scans.
If the hydronephrosis is diagnosed during pregnancy, early treatment will consist of monitoring with ultrasound, to check that the baby is growing normally and the kidneys are not getting too large.. After the baby is born, the hydronephrosis will be monitored using ultrasound scans in first week and subsequently as required and other tests. The overall treatment for hydronephrosis depends on what is causing it: