Ureteric Stricture After Surgery
A ureteric stricture can develop after abdominal, pelvic or urinary surgery when the ureter is directly injured, loses part of its blood supply, is affected by heat or energy devices, or heals around a previous urine leak. Symptoms may appear days, weeks or months later and include flank pain, fever or UTI, hydronephrosis or reduced kidney function. Some patients have no pain and the narrowing is found on follow-up imaging. Early drainage with a DJ stent or nephrostomy may be needed; established scar can require reconstruction tailored to the site and length of injury.
Which operations can be followed by ureteric narrowing?
- Ureteroscopy or laser treatment for an impacted stone.
- Gynecological surgery such as hysterectomy.
- Colorectal or other pelvic surgery.
- Urological cancer or reconstructive surgery.
- Radiotherapy combined with pelvic surgery.
- Previous ureteric reimplantation or urinary diversion.
How does the stricture form?
The ureter depends on a delicate longitudinal blood supply. Crushing, excessive dissection, thermal injury or devascularisation can produce ischemia. A partial injury can initially appear intact and later contract during healing. Urine leakage and inflammation can add fibrosis.
When do symptoms appear?
| Timing | Possible presentation |
|---|---|
| Immediately / early | Urine leak, flank pain, fever, drain output, rising creatinine or hydronephrosis. |
| Weeks later | Pain, infection or persistent hydronephrosis after stent removal. |
| Months later | Gradual scar contraction, recurrent UTI or loss of function; sometimes incidental. |
How is it evaluated?
| Test | Why it may be used |
|---|---|
| Serum creatinine / kidney function | Checks whether obstruction or injury is affecting renal function. |
| Urine routine and culture | Looks for blood or infection, especially before intervention. |
| Ultrasound | Shows hydronephrosis and is useful for initial and follow-up assessment. |
| CT urography with delayed images | Defines ureteric anatomy, level of obstruction and urine leak in many patients. |
| DTPA/MAG3 renogram | Assesses drainage and relative function of each kidney when functional obstruction is uncertain. |
| Retrograde / antegrade pyelography | Directly outlines the ureter when planning endoscopic or reconstructive treatment. |
Treatment
If there is infection or significant obstruction, drainage comes first. A stent may bridge a partial injury or short narrowing; nephrostomy provides reliable upper-tract drainage when retrograde stenting is not possible. Definitive reconstruction is chosen after anatomy and tissue condition are understood.
Reconstruction according to location
| Location / defect | Common option |
|---|---|
| UPJ / proximal | Pyeloplasty or selected proximal reconstruction. |
| Short proximal/mid | Uretero-ureterostomy. |
| Distal | Ureteric reimplantation. |
| Longer distal/mid | Psoas hitch or Boari flap. |
| Long proximal/mid | Buccal mucosal graft ureteroplasty. |
| Extensive long-segment loss | Ileal ureter or other substitution. |
Why operative notes matter
Knowing the original operation, exact injury, energy-device use, stent duration and previous repair materially changes planning. Bring the operative record whenever available.
Why the original operation matters to the reconstruction
Ureteric strictures after surgery can arise from direct transection, thermal injury, devascularisation, anastomotic scarring or instrumentation. Thermal and ischaemic injuries are important because the visibly narrow segment may underestimate the length of unhealthy ureter; reconstruction has to reach well-vascularised tissue rather than simply cut through the tightest point.
The operative note can therefore be as useful as the scan. It tells the reconstructive surgeon what procedure was performed, which side was at risk, whether a ureteric injury was recognised, whether a stent was placed and whether radiation, endometriosis or malignancy affected the field.
Short passable strictures may occasionally respond to endoscopic dilation/incision, but recurrence is common in complex ischaemic disease. Distal defects often use reimplantation with or without psoas hitch/Boari flap; proximal short defects may be rejoined directly; long strictures can require graft augmentation or bowel replacement. The objective is kidney preservation with a repair that does not depend indefinitely on repeated stent changes.
Why stent dependence should trigger a long-term plan
A chronic DJ stent can maintain drainage when reconstruction is not possible or while a patient is awaiting treatment. It also has costs: urinary frequency, flank discomfort, infection, encrustation and the need for scheduled exchange. A nephrostomy has different burdens but likewise requires care and planned changes.
For a medically fit patient with a benign reconstructable stricture, repeated stent exchanges should prompt a discussion about whether definitive repair can provide freedom from permanent hardware. Conversely, a high-risk patient with limited life expectancy or hostile malignant or radiated anatomy may reasonably choose long-term drainage instead of major reconstruction.
This is a preference-sensitive decision. The technically most elaborate surgery is not always the best treatment; the aim is reliable renal drainage with a burden acceptable to the patient.
Early postoperative narrowing versus delayed scar
A ureter that is swollen or kinked immediately after surgery can produce temporary hydronephrosis, especially while a stent is present. A fixed ischemic stricture may appear later as scar matures. The trend in symptoms, imaging and renal function is therefore more informative than a single early ultrasound.
If a postoperative stent is already in place, removing it without a follow-up plan can allow a hidden narrowing to declare itself after drainage is lost. Depending on the operation, the surgeon may arrange ultrasound, CT urography or a functional renogram after stent removal.
Persistent fever, flank pain or rising creatinine while a stent is present can still indicate obstruction or infection; a stent does not guarantee adequate drainage if it has migrated, blocked or does not bridge the injured segment.
Emergency warning signs
- Fever, chills or shivering with flank pain or known urinary obstruction.
- Severe worsening flank or abdominal pain with repeated vomiting.
- Markedly reduced urine output, especially with a solitary functioning kidney or bilateral obstruction.
- New confusion, weakness or feeling very unwell.
- A nephrostomy or stent-dependent patient with fever or failure of the drainage tube.
What to bring for consultation
- Ultrasound, CT urography/CT abdomen or MR urography reports and images if available.
- Renogram report (DTPA/MAG3) if performed.
- Serum creatinine and recent kidney-function reports.
- Urine routine and culture reports.
- Previous operative notes, discharge summaries and pathology reports if the problem followed surgery.
- Details of any DJ stent or nephrostomy: side, date placed and last change.
- A list of current medicines and any history of radiation, stones, endoscopy or pelvic surgery.
FAQs
Can the ureter look normal during surgery but scar later?
Yes. Ischemic or thermal injury can evolve over time.
Can a stent alone solve it?
It may in selected early or partial injuries, but mature fibrotic strictures often need definitive treatment.
Why a renogram if CT already shows hydronephrosis?
CT shows anatomy; a renogram helps quantify drainage and each kidney’s relative function.
Does reconstruction always remove the scar?
No. Some repairs excise and rejoin; graft ureteroplasty can widen a scarred segment.
Can treatment wait if I have no pain?
Symptoms alone do not determine safety because significant obstruction can be silent.
Related reading
- Ureteric Stricture: Symptoms and Treatment
- Ureteric Injury During Gynecological Surgery
- Ureteric Injury: Stent, Nephrostomy or Reconstruction?
- Ureteric Reimplantation Explained
- Pyeloplasty Surgery Explained
- Urologist in Latur
References
- European Association of Urology. EAU Guidelines on Urological Trauma, 2026 https://uroweb.org/guidelines/urological-trauma
- Bourillon A, et al. Ureteral stricture: current treatment algorithm and key surgical principles in the robotic upper urinary tract reconstruction era. World J Urol. 2026;44:102. PMID: 41546831 https://pubmed.ncbi.nlm.nih.gov/41546831/
- Hook S, et al. Update on ureteral reconstruction 2024. Die Urologie. 2024;63:25-33. PMID: 37989869 https://pubmed.ncbi.nlm.nih.gov/37989869/