In This Section      

Conditions We Treat: Ureteropelvic Junction Obstruction

The ureter is a long tube that carries urine from the kidney to the bladder. Ureteropelvic junction obstruction occurs when it becomes blocked by scar tissue, kinking, a blood vessel or, more rarely, a tumor

Ureteropelvic Junction Obstruction: What You Need to Know

medical illustration of male kidneys
  • Ureteropelvic junction obstruction can cause flank plain on the affected side. For some, the pain worsens shortly after drinking alcohol, coffee or other fluids.
  • Some people are born with the obstruction, but others develop it over time with age or following trauma.
  • Ureteropelvic junction obstruction can harm kidney function.
  • Laparoscopic pyeloplasty, a minimally invasive surgery, can be used to clear the blockage.

Patient Resources

Request an Appointment


Why choose Johns Hopkins for treatment of ureteropelvic junction obstruction?

Mohamad Ezzeddine Allaf, M.D.

Our Physicians


Rely on the expertise of our physicians to help manage ureteropelvic junction obstruction.

doctor talking with patient

Our Treatments


Our experts have pioneered robotic and minimally invasive surgical techniques to provide patients with better results and less downtime following treatment for ureteropelvic junction obstruction.


Request an Appointment

Maryland Patients

Adult Urology: 410-955-6100
Pediatric Urology: 410-955-6108


Traveling for Care?

Whether you're crossing the country or the globe, we make it easy to access world-class care at Johns Hopkins.

Outside of Maryland (toll free)

Request an Appointment
Medical Concierge Services

International Patients

Request an Appointment
Medical Concierge Services

blue suitcase