T-Plasty for Recurrent Bladder Neck Stenosis
The T-plasty is a modified Y-V plasty for the treatment of highly recurrent bladder neck stenosis (BNS), developed by the Hamburg group (Reiss, Rosenbaum, Dahlem et al.) and published in two sequential reports. Its defining feature is the use of two well-vascularized bladder wall flaps (rather than one, as in the standard Y-V plasty), creating a wider, more reliable reconstruction of the bladder neck. Across both published series (totaling 40 patients), the T-plasty achieved a 100% success rate with a median follow-up of 45 months, with only 1 case of de novo incontinence (3.3%).[1][2]
Conceptual Rationale
The standard Y-V plasty advances a single V-shaped bladder flap distally into the incised contracture. While effective, this provides tissue coverage from only one direction (typically anterior). The T-plasty modifies this concept by creating two opposing flaps from the anterior bladder wall, which are advanced into the opened bladder neck from both sides. Theoretical advantages over the single-flap Y-V plasty:[2]
- Wider reconstruction: Two flaps create a broader neo-bladder neck than a single flap.
- Redundant tissue coverage: If one flap has suboptimal healing, the other provides backup coverage of the scar bed.
- More reliable blood supply: Each flap retains its own vascular pedicle from the bladder wall.
- Single-staged approach: No need for grafts, tissue interposition, or staged procedures.
The name "T-plasty" derives from the shape of the final incision/closure configuration — the vertical incision through the contracture combined with the horizontal bladder wall incision creates a T-shaped configuration.[1][2]
Step-by-Step Surgical Technique
Based on Reiss et al. 2016 and the expanded series by Rosenbaum et al. 2017:[1][2]
- Positioning and access: Patient supine. A lower midline or Pfannenstiel incision is made. The space of Retzius is developed and the anterior bladder wall is exposed.
- Identification of the contracture: A cystoscope or sound is passed transurethrally to identify the level and extent of the bladder neck stenosis from the abdominal side.
- Anterior cystotomy and contracture incision: The anterior bladder wall is opened. The fibrotic bladder neck contracture is identified and incised vertically (in the sagittal plane) through the full thickness of the scar, extending from the bladder lumen distally into healthy urethra. This is the vertical limb of the "T."
- Creation of two lateral bladder flaps: A horizontal incision is made across the anterior bladder wall at the level of the bladder neck, perpendicular to the vertical incision — forming the horizontal limb of the "T." This creates two well-vascularized, full-thickness bladder wall flaps (one on each side of the vertical incision).
- Flap advancement and closure: The two lateral bladder flaps are advanced distally and medially into the opened contracture defect and sutured in place. Each flap covers one side of the incised scar bed with healthy, well-vascularized bladder mucosa. The flaps are sutured to each other and to the urethral edges, creating a wide, patent neo-bladder neck.
- Closure: The cystotomy is closed in standard fashion. A urethral catheter and suprapubic catheter are placed.
- Postoperative management: Catheter removal timing was not explicitly detailed in the publications, but follows standard open bladder neck reconstruction protocols (typically 2–3 weeks).
Published Outcomes
The T-plasty has been reported exclusively from a single center (University Medical Center Hamburg-Eppendorf) in two sequential publications.
Reiss et al. 2016 — index series[2]
| Parameter | Result |
|---|---|
| Number of patients | 10 |
| Etiology | Highly recurrent BNC after TURP/BPH surgery |
| Prior endoscopic treatments | Multiple (all patients) |
| Mean age | 69.2 years (range 61–79) |
| Mean follow-up | 26 months (range 3–46) |
| Success rate | 100% |
| Complications ≥ Clavien III | 0% |
| De novo stress incontinence | 0% |
| Urinary stream (very strong to moderate) | 80% |
| Mean postop IPSS | 11.3 (range 4–29) |
| Mean postop IPSS-QoL | 2.4 (range 1–5) |
| Patient satisfaction (very high or high) | 90% |
| QoL improved | 90% |
| SF-8 health survey | Comparable to reference population |
Rosenbaum et al. 2017 — expanded series[1]
| Parameter | Result |
|---|---|
| Number of patients | 30 |
| Etiology | 83.3% post-TURP; remainder post-other BPH surgery |
| Median age | 69 years (IQR 62–73) |
| Median follow-up | 45 months (IQR 18–64) |
| Lost to follow-up | 3 patients |
| Success rate | 100% (27/27 evaluable) |
| Severe blood loss | None |
| Severe perioperative complications | None |
| De novo incontinence | 1 patient (3.3%) |
| Mean ICIQ-SF score | 1.2 (SD ± 2.27) |
| Qmax improvement | 6.79 → 24.42 mL/s (p = 0.009) |
| PVR improvement | 140.77 → 14.5 mL (p = 0.004) |
| Patient satisfaction (pleased or delighted) | 88.5% |
| QoL (strongly) improved | 75% |
Key Strengths of the T-Plasty Data
- 100% success rate across 40 patients — the highest reported success rate for any open reconstruction technique for BNC, though from a single center.[1][2]
- Longest follow-up of any bladder neck reconstruction series: median 45 months (nearly 4 years) — substantially longer than robotic Y-V plasty (8–27 months) or TUITMR (6 months).[1]
- Dramatic functional improvement: Qmax nearly quadrupled (6.79 → 24.42 mL/s) and PVR decreased by 90% (140.77 → 14.5 mL).[1]
- Excellent continence preservation: Only 1/30 patients (3.3%) developed de novo incontinence in the expanded series.[1]
- No severe complications in either series.[1][2]
T-Plasty vs. Other Reconstruction Techniques
| Feature | T-Plasty | Robotic Y-V Plasty | TUITMR | Dorsal Onlay BMG |
|---|---|---|---|---|
| Approach | Open retropubic | Robotic transperitoneal/extraperitoneal | Endoscopic | Open perineal |
| Flap design | Two bilateral bladder flaps | One V-shaped bladder flap | Mucosal realignment (no flap) | Free buccal graft |
| Largest series (n) | 30 | 30 | 19 | 107 |
| Success rate | 100% | 83.3% | 89% (single) / 100% (cumulative) | 90.7% |
| Median follow-up | 45 mo | 27 mo | 6 mo | 59 mo |
| De novo SUI (BNC) | 3.3% (1/30) | 0% | 0% | 0.9% |
| Complications ≥ Clavien III | 0% | 6.7% | 0% | Variable |
| Primary population | Post-TURP/BPH | BNC + VUAS | BNC + VUAS | BNC + VUAS |
| Robotic platform required | No | Yes | No | No |
| Graft harvest required | No | No | No | Yes (buccal) |
References: [1][2][3][4][5][7][8]
Advantages Over Standard Y-V Plasty
- Two flaps vs. one: The bilateral flap design provides wider tissue coverage of the contracture site, theoretically reducing the risk of re-stenosis. The standard Y-V plasty relies on a single flap, which may be insufficient for circumferential or severe contractures.[2]
- Redundancy: If one flap has compromised vascularity or healing, the contralateral flap provides backup coverage — a safety net not available with a single-flap technique.[2]
- Wider neo-bladder neck: The two-flap configuration creates a broader lumen than a single flap advancement, which may explain the excellent Qmax results (mean 24.42 mL/s — higher than most Y-V plasty series).[1]
- Single-staged: Unlike BMG techniques, no graft harvest is required, and unlike some complex reconstructions, no tissue interposition or staged procedures are needed.[2]
Limitations and Caveats
- Single-center experience only: All 40 patients were treated at the University Medical Center Hamburg-Eppendorf by the same surgical team. No external validation or multi-institutional data exist.[1][2]
- Open approach only: The T-plasty has not been described robotically. In the current era of robotic reconstruction, the open retropubic approach may be perceived as more invasive, though operative outcomes (no severe complications, short hospital stay) were excellent.[1][2]
- BNC-only population: The T-plasty has been described exclusively for post-TURP/BPH bladder neck stenosis. It has not been studied for VUAS (post-prostatectomy) or in radiated patients — two populations where reconstruction is most challenging.[1][2]
- No comparative data: No head-to-head comparison with Y-V plasty, robotic reconstruction, BMG urethroplasty, or endoscopic techniques exists.[1][2]
- Uroflow data limited: Qmax and PVR improvements were statistically significant, but uroflow data were available for only a subset of patients (6 for Qmax, 10 for PVR in the expanded series).[1]
- Reproducibility unknown: The technique requires open retropubic bladder neck exposure and creation of two precisely designed flaps — the learning curve and reproducibility at other centers have not been assessed.[1][2]
Patient Selection
Based on the published inclusion criteria:[1][2]
- Indication: Highly recurrent BNC after transurethral surgery for BPH (TURP, PVP, HoLEP, etc.) that has failed multiple endoscopic treatments.
- Etiology: Post-BPH surgery only (not validated for VUAS or post-radiation stenosis).
- Contraindications (relative): Prior pelvic radiation (untested), VUAS (untested), obliterative disease (may require different approach).
Where the T-Plasty Fits in the Treatment Algorithm
For recalcitrant BNC after BPH surgery specifically:
- First-time BNC → Endoscopic incision or resection.
- First recurrence → Repeat endoscopic treatment (high cumulative success).
- Recalcitrant BNC (≥2 failed endoscopic treatments):
- T-plasty (open) — best long-term data (100% success at 45 months); ideal for centers without robotic platform.[1][2]
- Robotic Y-V plasty — comparable short-term success, minimally invasive, but shorter follow-up.[7]
- Dorsal onlay BMG — best evidence base overall (107 patients, 59-month follow-up, 90.7% success), but requires graft harvest.[5]
- TUITMR — fully endoscopic option, 89% single-procedure success, but only 6-month follow-up.[4]
For VUAS or radiated patients, the T-plasty has not been studied; other techniques (dorsal onlay BMG, robotic reconstruction) should be considered.[1][2]
Summary
The T-plasty is a conceptually elegant modification of the Y-V plasty that uses two bilateral bladder wall flaps to create a wider, more reliable reconstruction of the bladder neck. It has the best long-term success data of any reconstruction technique for post-BPH bladder neck stenosis — 100% patency at a median of nearly 4 years — with minimal morbidity and excellent continence preservation. Evidence is limited to a single center, an open surgical approach, and a BNC-only population. Multi-institutional validation, robotic adaptation, and application to VUAS/radiated patients would significantly strengthen the evidence base.[1][2]
References
1. Rosenbaum CM, Dahlem R, Maurer V, et al. "The T-Plasty as Therapy for Recurrent Bladder Neck Stenosis: Success Rate, Functional Outcome, and Patient Satisfaction." World Journal of Urology. 2017;35(12):1907-1911. doi:10.1007/s00345-017-2089-2
2. Reiss CP, Rosenbaum CM, Becker A, et al. "The T-Plasty: A Modified YV-Plasty for Highly Recurrent Bladder Neck Contracture After Transurethral Surgery for Benign Hyperplasia of the Prostate: Clinical Outcome and Patient Satisfaction." World Journal of Urology. 2016;34(10):1437-42. doi:10.1007/s00345-016-1779-5
3. Granieri MA, Weinberg AC, Sun JY, Stifelman MD, Zhao LC. "Robotic Y-V Plasty for Recalcitrant Bladder Neck Contracture." Urology. 2018;117:163-165. doi:10.1016/j.urology.2018.04.017
4. 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
5. Angulo JC, Dorado JF, Policastro CG, et al. "Multi-Institutional Study of Dorsal Onlay Urethroplasty of the Membranous Urethra After Endoscopic Prostate Procedures: Operative Results, Continence, Erectile Function and Patient Reported Outcomes." Journal of Clinical Medicine. 2021;10(17):3969. doi:10.3390/jcm10173969
6. Masumoto H, Horiguchi A, Shinchi M, et al. "Effectiveness of Y-V-Plasty for Refractory Bladder Neck Stenosis After Transurethral Prostate Surgery." International Journal of Urology. 2025;32(4):434-440. doi:10.1111/iju.15676
7. Abo Youssef N, Obrecht F, Padevit C, Brachlow J, John H. "Short and Intermediate-Term Outcome of Robot-Assisted Inverted YV-Plasty for Recurrent Bladder Neck Stenosis – A Single Centre Study." Urology. 2023;175:196-201. doi:10.1016/j.urology.2023.02.011
8. Viegas V, Freton L, Richard C, et al. "Robotic YV Plasty Outcomes for Bladder Neck Contracture vs. Vesico-Urethral Anastomotic Stricture." World Journal of Urology. 2024;42(1):172. doi:10.1007/s00345-024-04814-8