Ureteropelvic Junction Obstruction (UPJO): Tests and Diagnosis

What tests are used to diagnose UPJO?

A ureteropelvic junction obstruction is a congenital abnormality that can often be detected during pregnancy. It can be diagnosed during a prenatal ultrasound, however it may not show up until the child is older.

If your child is diagnosed prenatally, you may contact the Urology Department at Children's Hospital Colorado prior to, or immediately after, your child’s birth. If your child is not diagnosed at birth, contact Children’s Colorado Urology Department for further evaluation at the recommendation of your primary care physician.

How do doctors at Children’s Hospital Colorado make a diagnosis?

The diagnosis is made by renal ultrasound. Once the diagnosis is made, it is often necessary to perform regular ultrasounds to check on the progress of the hydronephrosis as it can resolve. In addition a MAG 3 renogram is needed to check on how the kidney is functioning and draining, and a VCUG study is required to evaluate whether there is any reflux of urine into the kidney.