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Principles of Urethral Reconstruction

Urethral reconstruction rests on five principles: define the stricture accurately, remove or fully open the diseased segment, reconstruct with healthy, well-vascularized tissue, create a tension-free mucosa-to-mucosa repair, and choose the technique that matches the stricture.[1][2][3]

The Urethral Reconstruction landing page indexes male and female techniques. The stricture scenarios below concern men; female stricture assessment and reconstruction follow different anatomy and continence considerations.[30]

1. Accurate Preoperative Stricture Staging Comes First​

Urethroplasty starts before the incision. The surgeon has to know where the stricture is, how long it is, how narrow it is, and what caused it.[1] That information determines whether the repair is excisional, augmented or staged, or whether perineal urethrostomy is chosen instead.

Imaging defines the map, but not perfectly​

RUG and VCUG remain the standard imaging studies, but radiographic length underestimates the length found at surgery. In a cohort of 29 men with high-grade anterior stricture, 11 reconstructive urologists interpreted 20 randomly selected pairs of radiographs obtained before and after suprapubic tube placement. Mean post-placement radiographic length underestimated intraoperative length by almost 1 cm (3.0 versus 3.8 cm), and the deviation increased with stricture length.[4]

Urethral rest improves operative planning​

After recent instrumentation, dilation or repeated manipulation, a period of urethral rest allows the lesion to mature. A suprapubic tube is used when obstruction or retention requires drainage. The EAU guideline cites Terlecki in proposing evaluation after two months and urethroplasty after three months of rest, and notes that the optimal duration is not known and that longer rest is appropriate with marked infection or inflammation.[27] In Terlecki's single-surgeon series, 28 of 128 anterior urethroplasty patients had a median of 3 months of rest, and severely fibrotic segments were excised in 75%.[5] In Moncrief's series, 11 urologists reviewed 20 randomly selected radiograph pairs from 29 men before and after suprapubic tube placement. They classified 23% of pre-placement image readings and 58% of post-placement readings as obliterative; their proposed operative plans changed 47% of the time, including toward excision in 37%.[4]

The final decision is still made in the operating room​

Even with good staging, the operative plan stays flexible. Spongiofibrosis, tissue quality and lumen caliber are judged directly at surgery.[2] Retrograde intraurethral methylene blue stains the strictured urothelium and leaves normal urethra pink; in one center's 492 anterior urethroplasties the stricture stained in 94%.[36] Cystoscopy with external transillumination and a marking suture at the distal end of the stricture is another way to localize it.[37] Before urethral surgery, obtain a urine culture and treat infection or colonization when present; administer intraoperative antibiotic prophylaxis .[27]

2. The Disease Is Spongiofibrosis, Not Just a Narrow Lumen​

The target of reconstruction is the underlying spongiofibrotic segment that has replaced normal pliable urethral tissue with scar, not the small lumen seen on cystoscopy.[6][7]

Two reconstructive strategies follow:

  • Complete excision of the scar with primary reconnection is used when the diseased segment is short enough.
  • Adequate urethrotomy through all unhealthy tissue into normal proximal and distal lumen is followed by graft or flap augmentation when excision would create too much tension or too much urethral loss.[2][3]

In his 27-year series of anastomotic posterior urethroplasty, Koraitim identified three operative details as the "gold triad" for a successful result:

  1. complete excision of scarred tissue,
  2. fixation of healthy mucosa at the two urethral ends,
  3. a tension-free anastomosis.[3]

3. Tension-Free, Mucosa-to-Mucosa Repair Is Non-Negotiable​

A urethral repair under tension heals poorly. Ischemia at the suture line can lead to breakdown, secondary healing and recurrent scar.[1][3][8]

For anterior urethra​

Tension can usually be addressed by:

  • generous urethral mobilization,
  • careful spatulation,
  • and, when needed, an augmented repair to avoid a tense anterior anastomosis; crural separation and inferior pubectomy are posterior PFUI maneuvers.[1][8][29]

For posterior urethra / PFUI​

Posterior repair follows a progressive perineal strategy:

  1. bulbar mobilization,
  2. crural separation,
  3. inferior pubectomy,
  4. and only rarely rerouting or transpubic / abdominal adjuncts.[1][8]

A series of 1,637 patients with pelvic fracture urethral distraction defects treated by progressive transperineal anastomotic urethroplasty reported a success rate of 92.4% (1,363 of the 1,475 with follow-up). After final repair, 125 patients (8.5% of those followed) had some degree of incontinence and 15 were reported to have de novo erectile dysfunction.[9] If a repair cannot be made tension-free, the reconstruction is modified with further mobilization, augmentation or staging.

4. Technique Selection Must Match Length, Location, and Etiology​

No single technique suits all strictures. Reconstruction is selected according to the length, location, obliterative severity, etiology and tissue quality of the lesion.[1][2][7]

Stricture scenarioUsual reconstructive logic
Short bulbar strictureNon-transecting repair or graft when feasible; transecting EPA for short traumatic obliteration with full-thickness scar
Longer bulbar strictureOral mucosal graft augmentation
Bulbar stricture with focal obliteration plus healthier adjacent urethraAugmented anastomotic or augmented non-transecting repair
Penile strictureUsually graft-based reconstruction rather than transection
Panurethral diseaseOne-stage long graft repair, staged repair, flap/graft combination, PU, or salvage options depending on etiology
Lichen sclerosusOral mucosa; one-stage or staged according to tissue quality; avoid genital skin
Complete PFUI with a distraction defectUsually delayed posterior anastomotic urethroplasty after urinary diversion[24]
Recalcitrant complex diseasePerineal urethrostomy, which had higher reported success than graft or flap repair in one retrospective series[11]

For the full reference on incisions and surgical approaches to male urethroplasty, which covers perineal skin incisions (midline, inverted-U and lambda), the three penile-stricture exposure approaches (degloving, Kulkarni invagination, midline ventral), anterior urethrotomy approaches (ventral, dorsal Barbagli, dorsolateral and non-transecting), posterior approaches, graft-placement configurations, and the one-stage versus staged decision, see Male Urethroplasty — Incisions & Approaches.

5. Oral Mucosa Is the Default Graft Material​

Oral mucosa is the graft of choice when substitution is needed.[1][7][13] The AUA guideline states that surgeons should use oral mucosa as the first choice when grafts are used and that buccal or lingual mucosal grafts may be used as equivalent alternatives .[1]

Advantages of oral mucosa:

  • hairless epithelium,
  • thick resilient surface,
  • thin vascular lamina propria,
  • easy harvest,
  • and a choice of buccal or lingual donor sites.[1][7]

Buccal harvest can cause persistent oral tightness, while lingual harvest can affect speech or eating. The EAU guidelines recommend counseling about graft-specific oral complications .[33]

The AUA guideline recommends against hair-bearing skin for substitution urethroplasty and against genital skin for reconstruction in lichen sclerosus-proven stricture .[1]

6. Graft Bed Vascularity Determines Graft Survival​

A free graft survives only if its recipient bed is healthy enough to carry it through imbibition, inosculation, and neovascularization.[7][14][15]

Graft placement follows from this:

  • Dorsal onlay uses the tunica albuginea of the corpora as a stable, well-supported graft bed.
  • Ventral onlay relies on the corpus spongiosum and can be used when spongiosal support is good.
  • Dorsal inlay / Asopa combines ventral access with dorsal support.
  • One-sided dorsolateral approaches aim to preserve vascular supply while still using a favorable graft bed.[14][15][16]

A systematic review of 41 mostly case-series studies (3,683 patients) found no single technique superior for bulbar free-graft urethroplasty, with recurrence of 20% or less at medium-term follow-up for dorsal and ventral onlay, and it could make no recommendation for dorsal inlay or dorsolateral onlay because of sparse evidence.[14] A meta-analysis of eight studies (655 patients) found similar success for dorsal and ventral onlay (RR 1.00, 95% CI 0.94–1.06) and less transient erectile dysfunction with the ventral technique.[14][16] The graft must lie on well-vascularized support and be fixed without hematoma, shear or dead space.[14][15][16] The quilting stitch places multiple small interrupted bites to secure the graft to the underlying corpus spongiosum or tunica and is used to obtain this apposition.

The AUA guideline recommends against single-stage tubularized graft urethroplasty . One side of a tubularized free graft has no reliable vascular bed.[1]

7. Vessel-Sparing and Non-Transecting Techniques Aim to Preserve Function​

Modern urethral reconstruction increasingly tries to preserve the urethra’s blood supply and minimize sexual side effects, especially in bulbar repairs.[17][18]

This principle appears in several forms:

  • vessel-sparing EPA,
  • non-transecting bulbar urethroplasty,
  • augmented non-transecting anastomotic repairs such as ANTA and MsANTA.[17][18][19][20]

These techniques remove or open the diseased lumen while preserving as much healthy spongiosal vascularity and neural support as possible. The Scandinavian Urethroplasty Study randomized 151 patients with a bulbar stricture of 2 cm or less to transecting EPA (n = 75) or BMG (n = 76). Patients in the transecting EPA group reported more penile complications (p = 0.02), including reduced glans filling and a shortened penis, on a questionnaire that was not validated. Postoperative IIEF-5 scores did not differ. Overall recurrence was 12.9% at 12 months, with similar rates between groups; the trial was not designed to detect differences in recurrence.[28] Transection is used when the stricture requires it.

8. Staged Reconstruction Is for Bad Tissue, Not Surgical Defeat​

Staged urethroplasty is used when local tissue is too diseased, scarred, ischemic or unreliable to support a one-stage tubular repair.[21][22]

Typical scenarios include:

  • Lichen sclerosus may require staging when adverse tissue conditions preclude one-stage oral mucosal repair; the EAU advises against staged bulbar repair when one-stage repair is feasible .[29]
  • failed hypospadias repair,
  • severe penile scarring,
  • repeated prior failed reconstructions.[1][10][21][22]

The intended sequence has two stages, but first-stage revision may be needed and some patients keep the first-stage urethrostomy permanently. The EAU recommends counseling that more than two operations may be required .[29]

  1. Open or excise diseased tissue to create a viable urethral plate, adding oral mucosa when native tissue is inadequate.[21][22][29]
  2. then tubularize only after the tissue has matured and proven it can survive.[21]

9. Perineal Urethrostomy Is a Definitive Reconstructive Option​

Perineal urethrostomy (PU) provides a permanent outlet when the proximal urethra is patent and sphincteric continence is preserved; proximal stenosis may require augmentation, and stomal stenosis and postmicturition dribble merit counseling.[29][31] The AUA guideline states that surgeons may offer PU as a long-term alternative to urethroplasty and should offer it to patients at high risk of failure of urethral reconstruction .[1] In a single-center retrospective series of 403 complex anterior strictures, success (no further operative management) at a median of 50.7 months was 94.8% for PU, 78.5% for BMG and 78.2% for penile skin flaps.[11] A 2025 meta-analysis of six observational cohorts (880 patients) found no statistically significant pooled success difference between PU and urethroplasty (RR 0.93, 95% CI 0.84–1.03), with substantial heterogeneity (I² 69%).[34] PU patients were older and had longer strictures and more lichen sclerosus.[11]

PU is particularly considered in patients with:

  • extensive lichen sclerosus,
  • multiple failed prior repairs,
  • very long complex anterior strictures,
  • major comorbidity,
  • or a preference for a simpler operation.[1][11]

10. Definitive Urethroplasty Should Be Offered Earlier​

The AUA guideline recommends offering urethroplasty for penile urethral strictures and as initial treatment for long (2 cm or more) bulbar strictures , given the low success of dilation and direct vision internal urethrotomy. A claims-database analysis identified 65,333 men with urethral stricture, of whom 52.7% underwent an intervention; among men with failed endoscopic management, the post-2016 period was associated with greater subsequent use of urethroplasty than the pre-guideline period (adjusted HR 2.57, 95% CI 2.07–3.19).[1][23]

This is especially true for:

  • penile strictures,
  • long bulbar strictures,
  • recurrent strictures after endoscopic failure.[1]

Repeated standard dilation or DVIU in a lesion unlikely to respond delays definitive repair and may worsen the field by adding manipulation and scar. For a recurrent bulbar stricture <3 cm after at least two failed endoscopic treatments, the 2026 EAU guideline recommends offering paclitaxel-coated balloon dilation when urethroplasty is unsuitable or declined ; counsel about contraception when a partner could conceive because paclitaxel has been detected in semen for up to six months.[29]

Recurrence after urethroplasty does not rule out another durable repair​

An August 2026 matched observational analysis compared 195 revision urethroplasties with 195 primary repairs matched by age, stricture length, etiology and technique. Five-year stricture-free estimates were 83% versus 85%; revision was not significantly associated with recurrence (HR 1.28, 95% CI 0.70–2.34). Recurrence meant inability to pass a 16 Fr flexible cystoscope atraumatically. Reported satisfaction and complications were also similar.[26]

Median follow-up was 138 months in patients without recurrence. The recurrent anatomy, tissue quality and alternatives are discussed with the patient.[26]

11. Posterior Urethroplasty Works Best as Delayed Reconstruction​

For male pelvic fracture urethral injury, AUA prefers suprapubic diversion for most cases (2020 Statement 20b; Recommendation, Grade C).[24] Selected stable patients may undergo primary realignment (Statement 22; Option, Grade C); avoid prolonged attempts .[24] Serial endoscopic treatment after failed realignment is avoided.[1][8][32] Partial posterior injuries may heal with catheter drainage , whereas complete disruption generally receives suprapubic diversion and urethroplasty after at least three months .[32] Selected stable men with complete disruption, a short gap, soft perineum and ability to tolerate lithotomy may undergo repair at two days to six weeks ; concomitant bladder-neck or prostatic lacerations require prompt reconstruction.[32]

Delayed perineal anastomotic repair allows scar definition, safe mobilization and mucosa-to-mucosa repair.[3][9][12][25] Counsel that rectal injury, reported in 0–4.9% across deferred posterior EPA series, is an uncommon but serious complication, particularly in complex or previously manipulated cases.[29] AUA 2020 describes suprapubic drainage followed by delayed reconstruction as the accepted pathway for most PFUI; it does not specify a universal 3–6-month interval.[24]

12. Protect the Repair and Measure Outcomes​

After a one-stage repair or closed second stage, maintain catheter drainage and obtain urethrography to assess extravasation before urethral catheter removal ; an open first-stage urethrostomy follows a different catheter pathway.[27]

Offer routine follow-up for at least one year , then tailor surveillance to recurrence risk . Assess anatomic patency alongside patient-reported urinary outcomes and validated sexual-function measures ; advise reassessment if late symptoms develop.[35]

Core Principles at a Glance​

  1. Stage the stricture accurately with imaging, urethral rest when needed, and a flexible intraoperative plan.
  2. Treat the spongiofibrosis, not just the lumen.
  3. Create a tension-free mucosa-to-mucosa repair.
  4. Match the reconstruction to length, location, etiology and severity.
  5. Use oral mucosa as the first-choice graft material.
  6. Respect graft-bed vascularity and support.
  7. Preserve blood supply when possible with vessel-sparing and non-transecting strategies.
  8. Use staged reconstruction when tissue biology requires it.
  9. Offer perineal urethrostomy as a definitive option in selected patients.
  10. Offer urethroplasty earlier when endoscopic success is unlikely.
  11. Match PFUI treatment to partial versus complete disruption and patient stability.

Bottom Line for the Reconstructive Surgeon​

Urethral reconstruction depends on accurate staging, full scar control, a tension-free repair, healthy vascular support and a technique chosen to suit the stricture.[1][2][3] The named techniques in the database apply these rules to different anatomy.

References​

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2. Dugi DD, Simhan J, Morey AF. Urethroplasty for stricture disease: contemporary techniques and outcomes. Urology. 2016;89:12-18. doi:10.1016/j.urology.2015.12.012

3. Koraitim MM. On the art of anastomotic posterior urethroplasty: a 27-year experience. J Urol. 2005;173(1):135-139. doi:10.1097/01.ju.0000146683.31101.ff

4. Moncrief T, Gor R, Goldfarb RA, Jarosek S, Elliott SP. Urethral rest with suprapubic cystostomy for obliterative or nearly obliterative urethral strictures: urethrographic changes and implications for management. J Urol. 2018;199(5):1289-1295. doi:10.1016/j.juro.2017.11.110

5. Terlecki RP, Steele MC, Valadez C, Morey AF. Urethral rest: role and rationale in preparation for anterior urethroplasty. Urology. 2011;77(6):1477-1481. doi:10.1016/j.urology.2011.01.042

6. Wong SS, Aboumarzouk OM, Narahari R, O'Riordan A, Pickard R. Simple urethral dilatation, endoscopic urethrotomy, and urethroplasty for urethral stricture disease in adult men. Cochrane Database Syst Rev. 2012;12:CD006934. doi:10.1002/14651858.CD006934.pub3

7. Horiguchi A. Substitution urethroplasty using oral mucosa graft for male anterior urethral stricture disease: current topics and reviews. Int J Urol. 2017;24(7):493-503. doi:10.1111/iju.13356

8. Horiguchi A. Management of male pelvic fracture urethral injuries: review and current topics. Int J Urol. 2019;26(6):596-607. doi:10.1111/iju.13947

9. Sa Y, Wang L, Lv R, et al. Transperineal anastomotic urethroplasty for the treatment of pelvic fracture urethral distraction defects: a progressive surgical strategy. World J Urol. 2021;39(12):4435-4441. doi:10.1007/s00345-021-03789-0

10. Levine LA, Strom KH, Lux MM. Buccal mucosa graft urethroplasty for anterior urethral stricture repair: evaluation of the impact of stricture location and lichen sclerosus on surgical outcome. J Urol. 2007;178(5):2011-2015. doi:10.1016/j.juro.2007.07.034

11. Fuchs JS, Shakir N, McKibben MJ, et al. Changing trends in reconstruction of complex anterior urethral strictures: from skin flap to perineal urethrostomy. Urology. 2018;122:169-173. doi:10.1016/j.urology.2018.08.009

12. Plamadeala N, Waterloos M, Waterschoot M, Lumen N. Posterior urethroplasty for pelvic fracture urethral injuries: risk factors for recurrence and complications. World J Urol. 2025;43(1):469. doi:10.1007/s00345-025-05839-3

13. Berg C, Singh A, Hu P, et al. Current trends in the use of buccal grafts during urethroplasty among Society of Genitourinary Reconstructive Surgeons. Urology. 2024;191:139-143. doi:10.1016/j.urology.2024.06.019

14. Barratt R, Chan G, La Rocca R, et al. Free graft augmentation urethroplasty for bulbar urethral strictures: which technique is best? A systematic review. Eur Urol. 2021;80(1):57-68. doi:10.1016/j.eururo.2021.03.026

15. Patterson JM, Chapple CR. Surgical techniques in substitution urethroplasty using buccal mucosa for the treatment of anterior urethral strictures. Eur Urol. 2008;53(6):1162-1171. doi:10.1016/j.eururo.2007.10.011

16. Hassan AA, Soliman AM, Shouman HA, et al. Dorsal- vs ventral-onlay buccal mucosal graft urethroplasty for urethral strictures: a meta-analysis. BJU Int. 2025;136(3):385-394. doi:10.1111/bju.16811

17. Virasoro R, DeLong JM. Non-transecting bulbar urethroplasty is favored over transecting techniques. World J Urol. 2020;38(12):3013-3018. doi:10.1007/s00345-019-02867-8

18. Chapman DW, Cotter K, Johnsen NV, et al. Nontransecting techniques reduce sexual dysfunction after anastomotic bulbar urethroplasty: results of a multi-institutional comparative analysis. J Urol. 2019;201(2):364-370. doi:10.1016/j.juro.2018.09.051

19. Joshi P, Bandini M, Kulkarni SB. Mucosal-sparing augmented non-transected anastomotic (MsANTA) urethroplasty: a step forward in ANTA urethroplasty. BJU Int. 2022;130(1):133-136. doi:10.1111/bju.15734

20. Welk BK, Kodama RT. The augmented nontransected anastomotic urethroplasty for the treatment of bulbar urethral strictures. Urology. 2012;79(4):917-921. doi:10.1016/j.urology.2011.12.008

21. Palminteri E, Gobbo A, Preto M, et al. The role of multi-staged urethroplasty in lichen sclerosus penile urethral strictures. J Clin Med. 2022;11(23):6961. doi:10.3390/jcm11236961

22. Figler BD, Gomella A, Hubbard L. Staged urethroplasty for penile urethral strictures from lichen sclerosus and failed hypospadias repair. Urology. 2018;112:222-224. doi:10.1016/j.urology.2017.10.020

23. Cabral JD, Alkassis M, Khalafalla K, et al. Contemporary trends in the management of urethral stricture disease in the era of the AUA guidelines. Urology. 2025;206:173-179. doi:10.1016/j.urology.2025.07.054

24. Morey AF, Broghammer JA, Hollowell CMP, et al. Urotrauma Guideline 2020: AUA Guideline. J Urol. 2021;205(1):30–35. doi:10.1097/JU.0000000000001408. Full guideline, published 2014; amended April 2017 and August 2020.

25. Koraitim MM. The lessons of 145 posttraumatic posterior urethral strictures treated in 17 years. J Urol. 1995;153(1):63-66. doi:10.1097/00005392-199501000-00024

26. AlShammari A, Filyk A, Hoy N, Rourke K. Second Time's a Charm? A Matched Case-Control Analysis of Revision Urethroplasty Versus Primary Urethroplasty. J Urol. Published online August 12, 2026. doi:10.1097/JU.0000000000005246.

27. European Association of Urology. Urethral Strictures: Perioperative Care of Urethral Surgery. 2026. Official guideline.

28. Nilsen OJ, Holm HV, Ekerhult TO, et al. To transect or not transect: results from the Scandinavian Urethroplasty Study. Eur Urol. 2022;81(4):375-382. doi:10.1016/j.eururo.2021.12.017.

29. European Association of Urology. EAU Guidelines on Urethral Strictures: Disease Management in Males. 2026. Official guideline.

30. European Association of Urology. EAU Guidelines on Urethral Strictures: Disease Management in Females. 2026. Official guideline.

31. Velarde Ramos L, Martins F. "Role of Perineal Urethrostomy in Reconstructive Urology." J Clin Med. 2026;15(11):4133. doi:10.3390/jcm15114133

32. European Association of Urology. EAU Guidelines on Urological Trauma: Urogenital Trauma Guidelines. 2026. Official guideline.

33. European Association of Urology. EAU Guidelines on Urethral Strictures: Tissue Transfer. 2026. Official guideline.

34. Zhao X, Li X, Song Y, Guo Q, Wang J. "Comparison of success rates between urethroplasty and perineal urethrostomy in the treatment of complex urethral strictures: a meta-analysis." World J Urol. 2025;43(1):327. doi:10.1007/s00345-025-05679-1

35. European Association of Urology. EAU Guidelines on Urethral Strictures: Follow Up. 2026. Official guideline.

36. Joshi P, Kaya C, Surana S, et al. A novel method in decision making for the diagnosis of anterior urethral stricture: using methylene blue dye. Turk J Urol. 2017;43(4):502-506. doi:10.5152/tud.2017.72368

37. Kuo TL, Venugopal S, Inman RD, Chapple CR. Surgical tips and tricks during urethroplasty for bulbar urethral strictures focusing on accurate localisation of the stricture: results from a tertiary centre. Eur Urol. 2015;67(4):764-770. doi:10.1016/j.eururo.2014.12.029