Yes. A ureteric stricture can recur after reconstruction, although most modern repairs are designed to provide durable drainage. Recurrence means the ureter narrows again at or near the reconstructed segment and hydronephrosis, flank pain, infection or loss of kidney function may return. Some recurrences are silent and are found only on follow-up imaging. The next step depends on the location and length of the new narrowing, kidney function, previous reconstruction, tissue quality and whether the kidney can be drained safely with a stent or nephrostomy while a definitive plan is made.

What does recurrence after ureteric reconstruction mean?

The repaired ureter can scar again at the anastomosis, within an augmented segment or at a new adjacent area. In published reconstructive series, success is often defined as freedom from repeat surgery or drainage and absence of symptomatic upper-tract dilation. Because definitions and operations differ, one single recurrence percentage should not be applied to every patient.

When can recurrence happen?

Many failures become apparent in the first months to a couple of years, but later recurrence is possible. Complex tissue injury, radiation and multiple previous operations can create a longer-term risk. An early normal scan is reassuring but does not make later symptoms irrelevant. Follow-up should therefore include objective assessment after stent removal and renewed imaging if flank pain, infection or hydronephrosis returns.

Symptoms that may suggest the blockage has returned

• Flank or loin pain.
• Repeated urinary infection or fever.
• Nausea/vomiting with episodes of pain.
• Rising creatinine in a patient with a solitary kidney or bilateral disease.
• Hydronephrosis found on follow-up ultrasound or CT.
• Need for a new stent or nephrostomy.
• No symptoms at all in some patients.

Why can a reconstructed ureter narrow again?

• Poor blood supply or ischaemic ureter.
• Long or complex stricture.
• Radiation damage.
• Multiple previous ureteroscopies, operations or failed repairs.
• Urinary leakage, infection or inflammation around the repair.
• Tension across the anastomosis.
• Underlying retroperitoneal or pelvic disease in selected cases.

How recurrence is confirmed

Ultrasound can show recurrent hydronephrosis. CT urography gives anatomical detail. A MAG3/DTPA renal scan can determine whether dilation is actually obstructive and measure differential kidney function. Retrograde or antegrade pyelography is useful when exact stricture length must be mapped for another procedure.

Does hydronephrosis after surgery always mean recurrence?

No. The kidney collecting system may remain somewhat dilated even after drainage has improved, especially after long-standing obstruction. The important questions are whether dilation is worsening, whether symptoms or infection have returned, and whether functional testing shows delayed drainage.

Treatment if the stricture comes back

Temporary drainage

A JJ stent or nephrostomy can protect the kidney, control infection and create time for accurate planning. In some complex cases, a period without a stent across the scar – while drainage is maintained by nephrostomy – helps define the true stricture before redo reconstruction.

Endoscopic treatment

A short, non-obliterative recurrence may sometimes be treated by dilatation or endoscopic incision. Long, dense or repeatedly recurrent strictures are less likely to remain open with repeated endoscopic treatment.

Redo ureteric reconstruction

Redo surgery may use the same family of operations or a different technique. A short recurrence may be re-excised; distal disease may need reimplantation/psoas hitch/Boari flap; long proximal disease may be augmented with buccal mucosa. Extensive failed reconstruction may rarely require ileal ureter or renal autotransplantation.

What about kidney function after recurrence?

The goal is to preserve a functioning kidney. Creatinine, cortical appearance and a differential renal scan help determine whether reconstruction remains worthwhile. Severe chronic obstruction can cause irreversible loss, but drainage should usually be established before making final decisions when infection or acute obstruction is present.

Follow-up after reconstruction

The exact schedule varies, but early imaging after stent removal and later surveillance are common. Patients with complex, long or radiation-associated strictures may need longer follow-up. New flank pain or UTI should trigger reassessment even if the previous scan was normal.

What to bring for consultation

• Original preoperative and postoperative CT/ultrasound images.
• Operation note describing the type of reconstruction.
• Stent and nephrostomy history.
• Any renal scan before/after surgery.
• Creatinine/eGFR and urine culture.
• Previous endoscopic treatment or redo reconstruction records.

Which patients need closer long-term surveillance?

Closer follow-up is reasonable after radiation-associated strictures, long graft repairs, multiple previous operations, extensive ischaemic injury or any reconstruction performed in a heavily scarred field. These patients do not necessarily have poor outcomes, but recurrence may be harder to treat if it is discovered only after substantial loss of kidney function.

Why recurrence after radiation is different

Radiation can injure the small blood vessels supplying the ureter and surrounding tissues. The visible stricture may therefore be only part of a wider zone of impaired tissue. Reconstruction may need to reach beyond the narrow segment into better vascularised tissue, and recurrence risk can remain higher than after a simple short non-radiated injury.

Can recurrence happen even after a technically successful operation?

Yes. Ureteric healing is biological, and scar can reform despite a well-constructed anastomosis. Ischaemia, inflammation and the original cause of the injury continue to influence healing after surgery. A recurrence therefore triggers reassessment rather than an assumption that one specific technical step must have been wrong.

FAQs

Related reading

• Recovery After Ureteric Reconstruction
• How Is the Type of Ureteric Reconstruction Decided?
• What If a Ureteric Stent Does Not Fix the Blockage?
• Ureteric Stricture: Can It Damage the Kidney?
• Hydronephrosis: Causes and Treatment
• Urologist in Latur

References

• European Association of Urology. EAU Guidelines on Urological Trauma: Ureteral Trauma, 2026 https://uroweb.org/guidelines/urological-trauma/chapter/urogenital-trauma-guidelines
• Bourillon A, Peyronnet B, McGuire BB, et al. Ureteral stricture: current treatment algorithm and key surgical principles in the robotic upper urinary tract reconstruction era. World J Urol. 2026;44(1):102. doi:10.1007/s00345-025-06181-4.
• Chao BW, Raver M, Lin JS, et al. Robotic Buccal Mucosa Graft Ureteroplasty: A Decade of Experience From a Multi-institutional Cohort. Urology. 2025;197:174-179. doi:10.1016/j.urology.2024.11.059.
• Bourillon A, McGuire BB, Pinar U, et al. Robot-assisted Buccal Mucosa Graft Ureteroplasty for Ureteral Stricture: A European Multicenter Case Series. Eur Urol Open Sci. 2026;83:166-172. doi:10.1016/j.euros.2025.12.007.