Vesicourethral Anastomotic Stenosis (VUAS)
VUAS is stenosis of the bladder-to-urethra anastomosis after radical prostatectomy, with or without radiation. Assess the lumen, length, sphincter relationship, tissue quality, bladder function, prior treatment and baseline continence before choosing treatment. When feasible, measure uroflowmetry and postvoid residual; for men being considered for reconstruction, use retrograde urethrography and add voiding cystourethrography for (nearly) obliterative stenosis. Cystoscopy can supplement imaging; the EAU strongly recommends considering MR urethrography as an ancillary test for posterior stenosis, and pelvic MRI can demonstrate a suspected urosymphyseal fistula tract after prostate irradiation.[13] Comparative evidence for robotic access, laser energy and nontransecting grafting is limited.[1]
Incidence and risk factors
In a registry of 17,904 men after radical prostatectomy (1987 to 2013; patients with prior pelvic radiotherapy excluded), 851 (4.8%) developed VUAS at a median of 3.4 months. VUAS was defined as symptomatic stenosis that did not admit a 17 Fr cystoscope. Adjuvant radiation, BMI, prostate volume, urine leak, blood transfusion and non-nerve-sparing technique were associated with VUAS. A robotic approach (OR 0.39) and complete nerve sparing (OR 0.63) were associated with less. VUAS was independently associated with one or more incontinence pads a day at one year (OR 1.76).[3]
Endoscopic treatment
For nonobliterative VUAS, visually controlled dilation or direct vision internal urethrotomy is first-line .[1] Across series of nontraumatic posterior stenosis, the EAU reports de novo urinary incontinence in up to 25% and worsening of existing incontinence in up to 15% after endoluminal treatment; counseling about these risks is a weak recommendation.[1] The AUA guideline amendment (2023) states that surgeons may perform dilation, vesicourethral incision or transurethral resection for post-prostatectomy VUAS .[4] Its text describes success in about 50% to 80% of first-time cases with similar rates across techniques, lower success after prior pelvic radiation, and a need for repeat treatment in some patients.[4]
- Single-center series. In 142 men (292 endoscopic treatments, mean 2.1 per patient), one treatment succeeded in 44.2%, and 91% were ultimately treated successfully at mean follow-up of 9.7 months (success was a lumen of 16 Fr or more on cystoscopy). The authors concluded that, unlike for anterior strictures, repeat endoscopic treatment appears justified. Holmium laser incision was associated with better success than other modalities except the UroLume stent. Radiotherapy was not associated with failure in this cohort.[5]
- Registry. Retreatment rates after VUAS treatment were 34% at one year and 42% at five years, and the authors described endoscopic management as temporizing for most men.[3]
- Meta-analysis. A 2024 systematic review of 40 endoscopic studies and 1,452 patients (median follow-up 23.7 months) estimated success at 72.8% (95% CI 64.4–79.9%), or 62.9% (53.6–71.4%) after adjustment for publication bias. Meta-regression showed lower success with radiotherapy (P = 0.012). Heterogeneous techniques and follow-up limit direct comparisons.[2]
Decision framework
| Clinical situation | Main considerations |
|---|---|
| Nonobliterative VUAS | Visually controlled dilation or DVIU; no universally preferred incision energy |
| Recurrent nonobliterative stenosis | Selected repeat endoscopic treatment or specialist reconstruction discussion according to burden and goals; no mandatory two-failure threshold |
| Complete obliteration | No endoluminal treatment; assess reanastomosis, tissue augmentation or drainage/diversion according to the defect |
| Prior radiation, fistula or necrosis | Evaluate tissue viability, bladder function and suitability for repair; no single graft/flap is a universal preferred solution. Redo VUA requires adequate bladder function and absence of urethral necrosis, calcification or fistulation.[1] |
| Significant SUI | Establish stable patency and assess storage before considering AUS, including its risks after radiation or urethral reconstruction. After DVIU for posterior stenosis, wait 3–4 months and rule out recurrence by cystoscopy before incontinence surgery; after redo VUA, most authors advise waiting at least 3–6 months and ensuring stable patency before staged AUS.[1] Cystoscopy or retrograde urethrography can assess anatomical patency; the EAU’s general urethroplasty guidance strongly recommends at least one year of routine follow-up after urethroplasty.[14] Counsel that transperineal redo VUA is expected to cause incontinence and may require staged AUS.[1] In a 46-man single-center transperineal redo-VUA cohort (median 80-month VUA follow-up), 30 received staged AUS; seven devices were explanted at median 97-month AUS follow-up, including five for erosion.[16] |
| Devastated outlet or bladder | Chronic suprapubic drainage, selected closure with another reliable outlet, or diversion; the prostate has already been removed |
Avoid deep incisions at 6 o'clock because of rectal injury, and at 12 o'clock because of urosymphyseal fistulation; the latter is of particular concern after radiotherapy.[1] EAU 2026 states that mitomycin C should not be used outside a clinical trial (guideline text, §6.3.5.a.2.c.2, after grade 3 complications in 4 of 55 patients in one multi-institutional series) and gives a weak recommendation not to use stents in the posterior urethra. It gives a strong recommendation against deep incisions at 6 and 12 o'clock for VUAS or radiation-induced bulbomembranous stenosis, and against endoluminal treatment when obliteration is complete. Posterior drug-coated balloon use is off-label; the EAU advises capturing VUAS use in a clinical trial or registry because evidence is inadequate for a recommendation. TUITMR and endoscopic grafting have limited comparative evidence.[1]
Choosing reconstruction
Consider length, caliber, sphincter involvement, preoperative continence, prior operations or radiation, viable tissue and bladder mobility together. The EAU weakly recommends offering retropubic redo VUA to patients continent before repair and advises that VUAS reconstruction be performed in experienced high-volume centers.[1] Transperineal reanastomosis, retropubic, transvesical and combined access address different defects.[1] A 2026 etiology-stratified meta-analysis pooled VUAS patency at 75% (95% CI 65–82%; n = 96) after robotic and 80% (69–87%; n = 85) after open reconstruction; heterogeneous techniques, endpoints and follow-up preclude a comparative approach ranking.[8]
The AUA amendment states that surgeons may perform robotic or open reconstruction for recalcitrant bladder neck or post-prostatectomy VUAS .[4] The AUA reports robotic reconstruction success of 72.7% to 75%; in a 12-patient mixed BNC/VUAS robotic cohort (five post-prostatectomy patients; median follow-up 13.5 months), the 75% endpoint was atraumatic passage of a 17-Fr cystoscope or Qmax >15 mL/s, and 82% of patients continent before surgery remained continent.[4][15] Open retropubic or perineal reconstruction had patency of 70% to 100%.[4] In separate retropubic and perineal case series cited by the AUA, postoperative incontinence was reported in 10% and 83.3%, respectively, of men continent before repair.[4] A retrospective comparison of 18 open perineal and 10 robotic reconstructions reported study-defined patency (passage of a 16 Fr cystoscope or Qmax >15 mL/s) of 77.8% and 80.0%, respectively.[6] Among men continent before repair, de novo incontinence was reported in 100% after open and 16.6% after robotic repair (P = 0.031).[6] Prior pelvic radiotherapy and preoperative incontinence were associated with patency failure.[6]
One institutional algorithm for robotic reconstruction chooses the operation by endoscopic lumen caliber and external urinary sphincter (EUS) involvement.[7]
| Endoscopic finding | Operation recommended by the authors |
|---|---|
| 10 Fr or larger lumen, no EUS involvement | Nontransecting bladder flap: Y-V plasty or T-plasty |
| Lumen under 10 Fr, no EUS involvement | Excision and primary anastomosis. When severe fibrosis, poor bladder mobility or long length prevents a tension-free anastomosis, the authors use a bladder flap kindred to the Tanagho flap (bladder neck closure, downward bladder advancement and a tubularized flap as a new bladder neck) |
| Any caliber with extension beyond the EUS | Combined robotic transabdominal and open transperineal urethral pull-through for a tension-free anastomosis |
Source notes for its numerical outcomes: balloon-only VUAS response was 16/27 in Ramchandani.[9] TUITMR achieved cystoscopic success after one procedure in 17/19 and after a second in 19/19 in a mixed BNC/VUAS cohort.[10] Transvesical reconstruction avoided repeat surgery for recurrent VUAS in 10/11 at median 22 months.[11] Bladder-flap repair had no recurrent stricture in 7/9 mixed BNC/VUAS patients at mean 21.1 weeks.[12] Sterling's dorsal-onlay BMG series included 21 anastomotic and 24 bulbomembranous stenoses after both prostatectomy and radiation, with seven recurrences among 45 men and no de novo SUI; median follow-up was 21 months among men without recurrence.[17] Primary patency, additional-treatment success, urethral voiding and patient-reported continence are separate outcomes.
Treatment Database
| Technique | Tier | Evidence / reported outcome | Clinical use |
|---|---|---|---|
| Transurethral Incision (Holmium Laser / Cold Knife / DVIU) | Endoscopic — First-Line | Heterogeneous endoscopic evidence | Nonobliterative VUAS; requires controlled access and a safe posterior incision. |
| Balloon Dilation | Endoscopic — First-Line | 16/27 in historical balloon-only cohort | Selected nonobliterative VUAS; no proven lowest-incontinence advantage. |
| Transurethral Incision with Transverse Mucosal Realignment (TUITMR) | Endoscopic — Adjunct / Novel | 17/19 after one and 19/19 after two procedures (17 Fr cystoscopy at 4 mo; median follow-up 6 mo; mixed BNC/VUAS) | Evolving mucosal-realignment technique; index cohort mixed BNC/VUAS. |
| Robotic Y-V Plasty | Reconstruction — Robotic | Selected observational cohorts | Refractory VUAS with appropriate tissue for advancement; substantial SUI risk requires counseling. |
| Robotic Transvesical BN Reconstruction (RTV-BNR) | Reconstruction — Robotic | 10/11 without reintervention for recurrence at median 22 mo | Selected short VUAS under 2 cm; small retrospective series does not establish superior continence. |
| Robotic Bladder Flap Posterior Urethroplasty | Reconstruction — Robotic | 7/9 without recurrence at mean 21.1 wk (mixed BNC/VUAS) | Selected mixed BNC/VUAS defects requiring a new flap-based anastomosis. |
| Robotic Subtrigonal BMG Inlay | Reconstruction — Robotic | Single index case report | Technical feasibility described in one refractory BNS case after prostate photovaporization (Avallone et al., PMID 31063762); applicability to VUAS is unknown. |
| Primary Re-Anastomosis (Open) | Reconstruction — Open | Varies by cohort, access and endpoint | Refractory or obliterative VUAS with viable tissue for tension-free reconnection. |
| Primary Re-Anastomosis (Robotic) | Reconstruction — Robotic | Varies by cohort, access and endpoint | Refractory or obliterative VUAS with viable tissue for tension-free reconnection. |
| Tanagho Flap | Reconstruction — Open | Historical/selected salvage reports | Bladder-tube reconstruction; distinct from a modern Y-V or short bladder-flap repair. |
| Combined Abdominoperineal Approach (Transperineal Advancement / Pull-Through) | Reconstruction — Open | Small selected combined-repair cohorts | Complex defects requiring both routes for access or tension-free tissue reach; PFUI outcomes are not VUAS outcomes. |
| Dorsal Onlay BMG (Sterling) — VUAS | Reconstruction — Graft-Based | 7 recurrences in 45 mixed VUAS/BMS patients | Selected nonobliterative anastomotic or bulbomembranous stenosis after both radical prostatectomy and radiation; no de novo SUI among men continent before repair in the mixed 45-man cohort. |
| Endourethroplasty | Reconstruction — Graft-Based | Small posterior cohorts and technical cases | Selected endoscopic grafting for nonobliterative stenosis; do not treat complete VUAS obliteration endoluminally. TUITMR is a separate nongraft technique. |
| Permanent Suprapubic Catheter | Salvage / Diversion | Drainage option | Temporary or long-term drainage according to function, reconstructive suitability and patient goals. |
| Continent Catheterizable Channel (Mitrofanoff) | Salvage / Diversion | Catheterizable access; long-term revision risk | Safe reservoir and reliable catheterization; assess need for closure or augmentation separately. |
| Urinary Diversion ± Cystectomy | Salvage / Diversion | Individual reconstruction-specific outcomes | Unsuitable bladder/outlet or unacceptable further reconstructive burden; select with the patient. |
See Also
- On WHITWIKI, the sister site for GU oncology: Radical Prostatectomy, Prostate Continence.
References
1. European Association of Urology. EAU Guidelines on Urethral Strictures. 2026. Disease management in males, section 6.3.5.a. Guideline.
2. Delchet O, et al. Post-prostatectomy anastomotic stenosis: systematic review and meta-analysis of endoscopic treatment. BJU Int. 2024. doi:10.1111/bju.16141.
3. Britton CJ, Sharma V, Fadel AE, et al. Vesicourethral anastomotic stenosis following radical prostatectomy: risk factors, natural history, and treatment outcomes. J Urol. 2023;210(2):312-322. doi:10.1097/JU.0000000000003488.
4. Wessells H, Morey A, Souter L, Rahimi L, Vanni A. Urethral stricture disease guideline amendment (2023). J Urol. 2023;210(1):64-71. doi:10.1097/JU.0000000000003482.
5. LaBossiere JR, Cheung D, Rourke K. Endoscopic treatment of vesicourethral stenosis after radical prostatectomy: outcomes and predictors of success. J Urol. 2016;195(5):1495-1500. doi:10.1016/j.juro.2015.12.073.
6. Savun M, Çolakoğlu Y, Özdemir H, et al. Comparison of open perineal and robot-assisted reconstruction in vesicourethral anastomotic stenosis. World J Urol. 2025;43(1):413. doi:10.1007/s00345-025-05808-w.
7. Naser-Tavakolian A, Lee Z. A review of management options for vesicourethral anastomotic stenosis and the emergence of robotic reconstruction. Transl Androl Urol. 2025;14(8):2405-2418. doi:10.21037/tau-24-503.
8. Roessler N, Klemm J, Fisch M, Dahlem R, Vetterlein MW, Trauma and Reconstructive Urology Working Party of the European Association of Urology Young Academic Urologists. "A systematic review and meta-analysis of surgical reconstruction for bladder neck and vesicourethral anastomotic stenosis: the case for etiology-specific definitions and reporting." Eur Urol Focus. 2026;12(3):360-372. doi:10.1016/j.euf.2026.06.012
9. Ramchandani P, Banner MP, Berlin JW, Dannenbaum MS, Wein AJ. "Vesicourethral Anastomotic Strictures After Radical Prostatectomy: Efficacy of Transurethral Balloon Dilation." Radiology. 1994;193(2):345-349. doi:10.1148/radiology.193.2.7972741
10. Abramowitz DJ, Balzano FL, Ruel NH, Chan KG, Warner JN. "Transurethral Incision With Transverse Mucosal Realignment for the Management of Bladder Neck Contracture and Vesicourethral Anastomotic Stenosis." Urology. 2021;152:102-108. doi:10.1016/j.urology.2021.02.035
11. Lee M, Lesgart M, McPartland C, Lee R, Eun DD. "Robotic Transvesical Bladder Neck Reconstruction: A Novel Approach to Managing Vesicourethral Anastomotic Stenosis." European Urology. 2025;88(5):519-524. doi:10.1016/j.eururo.2025.04.026
12. Zhao CC, Shakir NA, Zhao LC. "Robotic Bladder Flap Posterior Urethroplasty for Recalcitrant Bladder Neck Contracture and Vesicourethral Anastomotic Stenosis." Urology Video Journal. 2022;13:100133. doi:10.1016/j.urolvj.2022.100133
13. European Association of Urology. EAU Guidelines on Urethral Strictures. 2026. Diagnostic evaluation, section 5. Guideline.
14. European Association of Urology. EAU Guidelines on Urethral Strictures. 2026. Follow up, section 11. Guideline.
15. Kirshenbaum EJ, Zhao LC, Myers JB, et al. "Patency and Incontinence Rates After Robotic Bladder Neck Reconstruction for Vesicourethral Anastomotic Stenosis and Recalcitrant Bladder Neck Contractures: The Trauma and Urologic Reconstructive Network of Surgeons Experience." Urology. 2018;118:227-233. doi:10.1016/j.urology.2018.05.007
16. Klemm J, Oberneder K, Roessler N, et al. "Patient-reported Outcomes of Transperineal Reanastomosis for Recurrent or Obliterative Post-prostatectomy Vesicourethral Anastomotic Stenosis." Int Braz J Urol. 2026;52(4):e20260112. doi:10.1590/S1677-5538.IBJU.2026.0112
17. Sterling J, Simhan J, Flynn BJ, et al. "Multi-Institutional Outcomes of Dorsal Onlay Buccal Mucosal Graft Urethroplasty in Patients With Postprostatectomy, Postradiation Anastomotic Stenosis." J Urol. 2024;211(4):596-604. doi:10.1097/JU.0000000000003848