What Is a Ureterocele?

A ureterocele (pronounced “you-REE-ter-oh-seal”) is a swelling at the end of the ureter—the tube that carries urine from the kidney to the bladder. It looks like a small balloon or bubble where the ureter connects to the bladder.

What Causes It?

• Usually present at birth (congenital).

• Happens when the opening of the ureter is too narrow, causing urine to back up and stretch the ureter like a water balloon.

Types of Ureteroceles:

1. Simple (Orthotopic): Stays inside the bladder (more common in adults).

2. Ectopic: Extends into the urethra (more common in kids, especially girls).

Symptoms:

• Frequent UTIs (urinary tract infections)

• Pain in the side or belly

• Trouble peeing (if the swelling blocks urine flow)

• Blood in urine

• Wetting problems (in kids)

How Is It Diagnosed?

Doctors use:

• Ultrasound (shows the swollen ureter and kidney)

• VCUG (a special X-ray to check for urine backup)

• CT or MRI scans (for more detailed pictures)

Treatment Options:

• Antibiotics (if there’s an infection).

• Surgery:

  • Small cut (endoscopic incision) to drain the ureterocele.

  • Bigger surgery to fix the ureter if needed.

• If the kidney is badly damaged, it might need to be removed.

What Happens If It’s Not Treated?

• More infections.

• Kidney damage from urine backup.

• Bladder problems.

Most people do well after treatment, especially if caught early. Kids with ureteroceles often outgrow the problem after surgery.