For patients and families

Ureteral stricture

A patient guide to ureteral stricture and blocked kidney drainage: what it is, the records that help, and how the reconstructive team reviews a case.

01 / Understand

What is a ureteral stricture (or UPJ obstruction)?

The ureter is the tube that carries urine from the kidney down to the bladder. A stricture is a narrowed, scarred segment that blocks drainage; a UPJ (ureteropelvic junction) obstruction is a blockage where the kidney meets the ureter. When urine cannot drain freely, it can cause flank pain, recurrent infections, or gradual loss of kidney function. Many patients are managed for years with a stent or a nephrostomy tube before reconstruction is considered.

From the patient FAQ: What is a ureteral stricture (or UPJ obstruction)?

02 / Next

Records first, then a conversation

The most useful items are:

  • Imaging: CT urogram, MRI, retrograde/antegrade studies, or ultrasounds. The actual images matter, not just the reports; for many patients, asking the imaging center for CDs is still the simplest way to get a complete copy.
  • Operative notes from any prior urinary-tract surgeries.
  • Procedure and cystoscopy reports, including stent or tube changes.
  • A brief timeline of your symptoms and treatments, plus recent kidney-function labs.

Having these ready before your first call makes the review more useful. Contact the office and speak with the scheduling team about the best way to submit records for your case.

From the patient FAQ: What records should I gather before reaching out?

All appointments and surgery are scheduled through NYU Langone Health. Sending your records first helps the team review your case before you visit.

This is a personal educational website by Lee C. Zhao, MD, MS. Content is for informational and educational purposes only and does not constitute medical advice. Viewing this content does not create a physician-patient relationship. Not affiliated with NYU Langone Health.