Skip to navigation Skip to Content

Pediatric Urology - Hydronephrosis

​​​​​​​​​​Hydronephrosis refers to an enlargement of the kidney as a result of too much fluid accumulating within the kidneys. 

It is often seen in an ultrasound of an unborn child when a blockage in the urinary tract causes urine to backup from the bladder into the kidney. Marshfield Clinic Urologists are experts in treating this condition.


A physician will perform an ultrasound a few days after birth to determine if the condition has persisted. Course of treatment is as follows:

"Voiding" procedure
In order to rule out reflux (urine moving from the bladder to the kidney), a physician may consider inserting a catheter into the bladder and filling it with liquid to see if there is backflow. 

If so, the child may be given antibiotics and regular check-ups to confirm the condition is improving.

Many blockages that lead to hydronephrosis require a surgical procedure that can be done to remove the blocked portion of the urinary tract and reconnect it near the kidney to the bladder.

Surgical Removal
In severe cases, a child's kidney may be found to be multicystic (having cysts of irregular size) or non-functioning. In this case, if the second kidney is fully functional, the physician may choose to remove the damaged kidney.

Request Appointment

Contact us for care

If this is a medical emergency, call 911.

Call: 1-866-520-2510

(Monday-Friday, 8 a.m. - 5 p.m.)

Take the Urinary Tract Infection Quiz

Your urinary tract includes the organs that collect and store urine and release it from your body. They are the kidneys, ureters, bladder, and urethra.

1. The average adult passes about 3 quarts of urine a day.
2. Normal urine is sterile.
3. Many different types of bacteria can cause an infection of the urinary tract.
4. If an infection of the urethra isn't treated, the bacteria can move up to the bladder, causing an infection there.
5. A kidney stone can cause a UTI.
6. People with diabetes are more likely to get UTIs.
7. Women get more UTIs than men.
8. Feeling tired, shaky, and washed out are symptoms of a UTI.
9. Often, a UTI can be cured with 1 to 2 days of treatment.