Vesicourethral anastomotic stenosis (VUAS) is scar narrowing at the surgical join between the bladder and urethra after radical prostatectomy. It can cause a progressively weak stream, retention or difficulty passing a catheter. Cystoscopy confirms the stenosis and helps determine whether it is open but narrow or completely obliterated. Non-obliterative VUAS is usually treated first with endoscopic incision or dilatation. Refractory or obliterated stenosis may require reconstruction, with careful counselling because relieving the obstruction can uncover or worsen urinary incontinence.

Why does VUAS develop?

After the prostate is removed for cancer, the bladder neck is joined to the urethral stump. Healing can occasionally contract at this anastomosis. Risk is influenced by local tissue healing, leakage, infection, previous radiation and repeated instrumentation.

What symptoms can it cause?

• Weakening stream after initially satisfactory postoperative voiding.
• Straining or prolonged urination.
• Increasing post-void residual.
• Urinary retention.
• Difficulty inserting a catheter for later treatment.
• Recurrent UTI.

How is it different from urethral stricture?

An anterior urethral stricture is scar within the penile or bulbar urethra. VUAS is at the bladder-to-urethra surgical join after radical prostatectomy. The location matters because the anastomosis lies close to the continence mechanism and cancer-treatment history affects tissue quality.

Tests used

First-line treatment for non-obliterative VUAS

Endoscopic treatment is commonly used first. The stenosis may be dilated or incised under vision. More than one endoscopic treatment can be attempted for a non-obliterative recurrence in selected patients, but repeated failure should lead to a discussion about reconstruction.

Why complete obliteration is different

If there is no true lumen, blindly cutting through the scar can create a false passage toward the bladder or rectum. Completely obliterated or highly recurrent disease is a reconstructive problem and should be assessed in a centre familiar with posterior urethral/bladder-neck reconstruction.

Reconstruction for refractory VUAS

Open or minimally invasive reconstruction may be approached from the perineum, abdomen/robotically or with combined techniques depending on the scar and previous treatment. The goal is a patent anastomosis, but the operation can affect the continence mechanism. In some men, continence surgery such as an artificial urinary sphincter is considered only after the stenosis is stable.

What about radiotherapy?

Radiation can make tissue less vascular and increase the complexity of recurrence and healing. A history of salvage or adjuvant radiotherapy changes both reconstructive counselling and the continence plan.

Why VUAS treatment and continence treatment are sequenced

After radical prostatectomy, the scar and the urinary sphincter sit close to one another. A tight anastomotic stenosis can sometimes mask stress incontinence. Once the channel is opened, leakage may become more obvious, which is why continence should be recorded before each treatment.

If an artificial urinary sphincter is eventually needed, the anastomosis should first be stable and adequately patent. Repeated instrumentation through a newly implanted continence device is undesirable. In complex cases, the reconstructive plan is therefore often staged: establish durable patency first, reassess continence, then treat persistent stress incontinence.

Complete obliteration is not simply a tighter stenosis

Endoscopic treatment requires a recognisable channel that can be crossed safely. In complete vesicourethral obliteration there may be no true lumen to incise, and aggressive blind or deep cutting risks injury to adjacent structures. Current EAU guidance does not recommend endoluminal treatment for complete obliteration.

Reconstruction in this setting is specialised and may be performed through abdominal, perineal or combined approaches depending on anatomy, prior radiation and bladder-neck position. The expected effect on continence is part of the decision from the beginning.

What to bring for consultation

• Radical-prostatectomy operative/discharge records.
• Radiotherapy records if applicable.
• PSA trend and current oncological follow-up information.
• Previous cystoscopy, dilatation or bladder-neck incision reports.
• Current urinary continence status and pad use.
• Uroflowmetry/PVR and any RGU/VCUG images.

Patency and continence have to be planned together

Vesicourethral anastomotic stenosis (VUAS) occurs where the bladder was joined to the urethra after radical prostatectomy. A very tight anastomosis can partly mask sphincteric urinary incontinence; after the scar is opened, leakage that was previously hidden may become more obvious. For this reason, the conversation is not only “how do we open the scar?” but also “what will continence look like once it is open?”

Non-obliterative stenosis is usually treated endoscopically first, and repeat endoscopic treatment can be reasonable in selected recurrence. Complete obliteration is different and generally needs reconstructive planning rather than blind incision. Radiation history, previous bladder-neck procedures, the length of scar and the status of the external sphincter all influence the risk profile.

If significant stress incontinence remains after the anastomosis is stable, continence surgery such as an artificial urinary sphincter may be discussed separately. It is usually unwise to implant a continence device through an unstable, repeatedly narrowing outlet. A period of demonstrated urethral/anastomotic stability therefore often sits between stenosis treatment and definitive continence surgery.

What evaluation is useful before another VUAS procedure

Cystoscopy establishes whether the anastomosis is a narrow ring, a longer fibrotic segment or completely obliterated. Uroflow/PVR quantify the functional effect. When the lumen is nearly or completely closed, combined retrograde and antegrade imaging may be needed to understand the distance between bladder and urethra.

Cancer history matters. PSA status, prior salvage radiotherapy and dates of prostatectomy/radiation should be available because recurrent cancer, radiation fibrosis and surgical scarring can coexist. Continence should be quantified with pad use rather than described only as “some leakage.”

After treatment, a stable open anastomosis is usually demonstrated before an artificial urinary sphincter is implanted. This sequencing reduces the chance that future instrumentation for recurrent stenosis will have to pass through and endanger a continence device.

How stenosis treatment fits with continence after radical prostatectomy

After radical prostatectomy, the vesicourethral anastomosis lies immediately adjacent to the continence mechanism. A patient can therefore have both a scarred anastomosis and sphincter weakness. Opening the stenosis may reveal stress incontinence that was partly masked by the obstruction.

The usual strategy is to achieve a stable, passable anastomosis first. Endoscopic incision or dilation is used in many non-obliterative cases; recurrent or obliterative stenosis may require reconstructive surgery in selected patients. Once patency has remained stable, persistent severe stress incontinence can be assessed for treatment such as an artificial urinary sphincter.

This sequencing matters because repeated instrumentation through a newly implanted continence device can increase erosion or infection risk. It also helps patients understand that “successful stenosis treatment” means the urinary channel is open; continence is a separate functional outcome that may require a later plan.

Why cancer follow-up remains part of the assessment

A narrowing after radical prostatectomy is a functional complication, but the original cancer history remains relevant. PSA surveillance continues according to the oncological plan, and any planned salvage or previous pelvic radiation can affect tissue healing and the choice or timing of reconstruction.

If radiation is anticipated, the urologist and oncology team may need to coordinate sequencing. A stable urinary outlet is desirable, but repeated manipulation in previously irradiated tissue can become progressively more difficult.

Bring the prostatectomy histopathology, recent PSA results, radiation records and prior endoscopy reports when available. They help place the stenosis within the whole post-prostatectomy pathway rather than treating it as an isolated scar.

FAQs

Related reading

• Bladder Neck Contracture After Prostate Surgery
• Radiation-Induced Urethral Stricture
• Cystoscopy in Urethral Stricture
• Redo Urethroplasty After Failed Surgery
• Follow-Up After Urethroplasty
• Meatal Stenosis in Men: Symptoms and Treatment
• Urologist in Latur

References

• European Association of Urology. EAU Guidelines on Urethral Strictures: Disease Management in Males, 2026 https://uroweb.org/guidelines/urethral-strictures/chapter/disease-management-in-males
• European Association of Urology. EAU Guidelines on Urethral Strictures: Diagnostic Evaluation, 2026 https://uroweb.org/guidelines/urethral-strictures/chapter/diagnostic-evaluation
• European Association of Urology. EAU Guidelines on Urethral Strictures: Follow-up, 2026 https://uroweb.org/guidelines/urethral-strictures/chapter/followup
• European Association of Urology. EAU Guidelines on Urethral Strictures, 2026 https://uroweb.org/guidelines/urethral-strictures
• American Urological Association. Urethral Stricture Guideline (2023 amendment) https://www.auanet.org/guidelines-and-quality/guidelines/urethral-stricture-guideline