Unilateral Hydronephrosis
When only one kidney (right or left) stretches, blockage is suspected only on that side. When kidneys only stretch, the blockage is suspected at a higher location (PUJ obstruction). When the pipe draining the kidney also stretches, blockage is suspected at a lower location (VUJ obstruction).
Newborns with this problem need to be scanned on the third day after birth. In general very mild stretching is likely to settle spontaneously. Huge stretching requires surgery urgently to prevent loss of kidney function (renal failure). Children with moderate stretching need close monitoring with repeat scans and further tests. It is essential to consult a pediatric urologist to determine what tests are required and when a surgery could be avoided. Also it is essential to prevent urinary infection by taking a small dose of antibiotic once at night.
Unilateral Hydronephrosis
