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V-Y Advancement Flap

The V-Y advancement flap brings a triangular segment of local tissue into a neighboring defect, closing the donor incision in a Y configuration. It is used in selected genital, perineal and vulvovaginal reconstruction; vascular supply and safe excursion depend on donor anatomy and flap design. The Y-V plasty name describes the opposite incision-to-closure direction, but bladder-wall Y-V repairs and cutaneous V-Y flaps are not interchangeable procedures.[1][7]

Geometric Principle​

A V-shaped incision is made adjacent to a defect. The triangular flap is mobilized to the extent its pedicle permits and advanced into the defect. As the flap moves forward, the donor site closes behind it, converting the original V into a Y.[1]

  • The degree of advancement depends on apex angle, flap size, and skin elasticity.
  • Perforator-based modifications may allow more excursion in selected vascular territories, but still require a reliable pedicle and tension-aware closure.[2]

The directional contrast with Y-V plasty is the central teaching point and is summarized in the table on the Y-V plasty page.

Urologic Applications​

Penile lengthening and buried penis​

Suprapubic V-Y designs have been reported as components of selected penile-reconstruction operations.

  • In patients with extensive penile fibrosis undergoing prosthesis implantation, a modified suprapubic V-Y advancement flap with lower-abdominal tissue debulking yielded an additional 3.5–6.5 cm of functional length in 11 patients, with no prosthesis infections and all devices functional after a mean follow-up of 12 months.[3]
  • For cosmetic penile lengthening, the V-Y flap has been combined with suspensory-ligament release. In Shaeer’s described half-skin half-fat V-Y and T-closure technique, the fat flap fills the penopubic gap while the skin V closes as a Y.[4] In this single-patient case report, no incision hump or loss of gained length was observed at six months.[4]
  • Alexander et al. described ventral V-plasty for congenital megaprepuce in 10 children; it is a distinct ventral-coverage technique, not V-Y advancement. Cosmetic results were good in nine, while one had a residual defect for which minor revision was planned.[5]

See Buried Penis Repair for the buried-penis technique page.

Bladder neck contracture / VUAS​

Bladder-neck reconstruction may advance a V-shaped bladder-wall flap through a Y-shaped incision, but the cited procedures are named Y-V plasty, not a cutaneous V-Y flap.[6][7][8]

See Y-V plasty and BNC / VUAS Reconstruction for technique-level detail.

Meatal stenosis and distal urethral reconstruction​

The cited post-hypospadias operation is specifically Y-V meatoplasty, despite advancing a small V-shaped tissue segment into the ring: 55/57 patients reported symptom relief in one retrospective series (median four-year follow-up; six under one year).[9] The 2023 AUA urethral-stricture guideline addresses recurrent meatal or fossa-navicularis strictures at the broader treatment level.[10]

Fournier's gangrene — perineal and scrotal reconstruction​

V-Y advancement flaps are among the reported reconstructive options after debridement for Fournier's gangrene:

  • El-Khatib described the axial-pattern V-Y fasciocutaneous pudendal-thigh flap as a new indication and design modification for urogenital resurfacing after necrotizing fasciitis. In a 13-patient series, eight patients received bilateral and two received unilateral flaps. The authors described midline tailoring, primary donor-site closure, and satisfactory functional and aesthetic results for this reconstruction.[11]
  • A 2026 review included 619 patients/625 mixed flap reconstructions after Fournier's gangrene and reported 1.6% pooled flap loss. This is neither a V-Y-specific failure rate nor proof of preference for one regional flap design.[12]

See Scrotal Reconstruction for the Fournier's reconstruction technique page.

Urogynecologic Applications​

Vulvovaginal reconstruction after oncologic resection​

V-Y flaps are among the most commonly used techniques for vulvar and vaginal reconstruction after cancer surgery. In a 2024 multicenter retrospective cohort after radical vulvar surgery, postoperative wound dehiscence occurred in 29/190 women (15.3%) with V-Y reconstruction versus 48/171 (28.1%) without reconstruction.[30] They can be raised from three principal donor sites:[14]

Donor siteDesignNotes
Pubolabial (cranial)V-Y "amplified sliding flap" from the pubis combining downward advancement with bilateral medial rotationA single flap can restore the entire vulva after total vulvectomy if groin dissection does not extend medially; medial extension precludes this pubolabial design[14]
Medial thigh (lateral)V-Y fasciocutaneous; can include gracilis fascia / muscle for extended advancementThe stepladder V-Y modification uses zigzag incisions to reduce scar contracture from a long straight suture line; all flaps survived and urination was normal in the three patients reported[15]
Gluteal fold (caudolateral)V-Y based on internal pudendal artery perforatorsThin, sensate, reliable flaps; 17 flaps / 9 patients with all flaps surviving (three small perineal wound disruptions), matched skin quality, concealed donor scars[16]; a modified gluteal-fold V-Y with additional transposition flaps at the base covers selected larger or deeper defects (up to 15 × 12 cm); all flaps survived in 16 patients, and the authors described aesthetic and functional results as satisfactory at mean 10.6-month follow-up[17]

The interrupted V-Y advancement flap is a refinement that reduces bulkiness by incorporating a bipedicled flap within the defect area, supplied by the internal pudendal vessels; all 5 flaps survived without complications in vulvovaginal reconstruction for extramammary Paget's disease and vulvar carcinoma.[18]

Perineal and pelvic reconstruction after APR / pelvic exenteration​

The perforator-based pentagonal gluteal V-Y advancement flap (PPVYAF) was evaluated retrospectively in 110 patients: 71 after abdominoperineal resection, 28 after pelvic exenteration, five after anterior resection and six after surgery for Paget disease. Of these, 33 had concomitant vaginal reconstruction (15 posterior wall, 18 total). Wound breakdown requiring resuturing occurred in 12/110 (10.9%), and partial flap necrosis requiring debridement in 3/110 (2.7%). At a mean 12-month follow-up, 91/110 patients were alive; the authors reported no perineal hernia, nonhealing wound, or flap pressure sore, without specifying the number examined for these outcomes.[19]

In a separate APR-focused perineal-reconstruction series, all 51 gluteal V-Y fasciocutaneous flaps survived in 31 selected patients; 42% of patients had minor complications, including wound separation, and two returned to the operating room for abscess drainage.[13]

Introital stenosis — lichen sclerosus​

Vulvar lichen sclerosus can cause progressive introital stenosis leading to dyspareunia or even complete obliteration with urinary retention.[20] For women with persistent lichen-sclerosus-related introital stenosis impairing voiding or intercourse despite guideline-conform topical corticosteroids, the 2026 German S3 guideline suggests de-adhesion, synechiolysis, perineoplasty or anatomic vulvoplasty (weak, consensus-based).[29] It also recommends preoperative counseling and agreement about required topical treatment, usually corticosteroid ointment, before and after surgery.[29] Reported perineoplasty and local-flap outcomes include:

  • In a retrospective LS cohort of 64 operated patients, 45/50 questionnaire respondents reported improved dyspareunia and 43/50 reported improved intercourse quality after perineoplasty.[21]
  • In a 38-patient LS series treated with local skin flaps, 75% of surveyed patients with preoperative dyspareunia reported surgical benefit and 74% of survey respondents were satisfied with cosmetic results; the mean time from treatment to survey response was 7.6 years. LS relapse remained the main cause of recurrent symptoms.[22]
  • The constricted or obliterated vagina may require etiologic treatment followed, in selected cases, by vaginal advancement, Z-plasty, grafts, or perineal / abdominal flaps. The cited review supports postoperative surveillance and dilation after reconstruction.[23]

Episiotomy dehiscence and perineal-body defects​

V-Y advancement flaps have been applied for recurrent perineal defects after episiotomy dehiscence: the episiotomy scar is excised, a V-shaped flap is created to fill the defect, and on advancement the V converts to a Y with tension-free closure. The single-patient video report described no flap necrosis and a satisfactory aesthetic result.[24]

Vaginal stenosis after radiation therapy​

Radiation-associated vaginal stenosis is a late effect, but its frequency varies by treated population and definition.[25] Dilation after radiotherapy is associated with less self-reported stenosis in observational studies, but causation is uncertain. The 2014 Cochrane review advises against dilation during active radiotherapy because benefit is unproven and inflamed tissue may be harmed; post-treatment dilation is considered after acute inflammation settles.[25] Severe or complete stenosis may prompt reconstructive assessment.[23][26][27] Surgical options described across these sources include vaginal advancement, Z-plasty, Singapore (pudendal-thigh) flaps, other perineal or thigh flaps, and grafts.[23][26][27]

Summary of Applications​

ApplicationDonor site / techniqueKey outcome
Penile lengthening / buried penisSuprapubic V-Y with prosthesis implantation and debulking3.5–6.5 cm additional functional length in 11 selected penile-fibrosis patients[3]
Bladder-neck contracture / VUASDistinct Y-V bladder-wall repairSee Y-V plasty[6][7][8]
Meatal stenosisDistinct Y-V meatoplasty55/57 symptom relief in one selected series[9]
Fournier's gangrenePudendal-thigh V-Y and other regional flaps1.6% loss pooled across mixed designs[11][12]
Vulvovaginal oncologic defectsMedial thigh / gluteal fold / pubolabial V-YSmall donor-specific series report survival; no pooled V-Y survival rate is established here[14][16][17]
Perineal reconstruction (APR / exenteration and other cases)Pentagonal gluteal V-Y3/110 (2.7%) partial necrosis requiring debridement across a mixed cohort (71 APR, 28 exenteration, 5 anterior resection, 6 Paget disease cases) in one series[19]; a separate APR systematic review reported perineal hernia in 7/47 (14.9%) gluteal fasciocutaneous V-Y recipients in studies reporting that outcome[28]
Introital stenosis (lichen sclerosus)Perineoplasty/local flaps45/50 respondents reported improved dyspareunia after perineoplasty; V-Y-specific effect not established[21][22]
Episiotomy dehiscencePerineal V-Y flapNo flap necrosis, satisfactory cosmesis in one reported patient[24]

Technical Pearls​

  • Apex angle and closure tension. In a finite-element model, larger apex angles increased closure force. For tight or stiff skin, a narrower, longer flap reduced the modeled closure force.[1]
  • Perforator-based design can increase excursion in a suitable vascular territory, but does not remove donor-site and venous-outflow limits[2]
  • Bilateral V-Y flaps allow midline tailoring with primary donor-site closure for selected wide perineal defects after Fournier debridement or anorectal resection.[11][31] In Chavan et al.'s anorectal-cancer series, the authors describe de-epithelializing and burying the medial 5–7 cm of the flap to fill large pelvic dead space before closure.[31]
  • Stepladder / zigzag modifications are described to redistribute a medial-thigh scar[15]
  • Irradiated fields require assessment of tissue quality and reliable perfusion beyond Doppler confirmation; selection among local, regional and muscle-bearing options depends on the defect

See Also​

References​

1. Remache D, Chambert J, Pauchot J, Jacquet E. "Numerical Analysis of the V-Y Shaped Advancement Flap." Med Eng Phys. 2015;37(10):987–994. doi:10.1016/j.medengphy.2015.08.005

2. Yildirim S, Taylan G, Aköz T. "Freestyle Perforator-Based V-Y Advancement Flap for Reconstruction of Soft Tissue Defects at Various Anatomic Regions." Ann Plast Surg. 2007;58(5):501–506. doi:10.1097/01.sap.0000247953.36082.f4

3. Knoll LD, Fisher J, Benson RC, et al. "Treatment of Penile Fibrosis With Prosthetic Implantation and Flap Advancement With Tissue Debulking." J Urol. 1996;156(2 Pt 1):394–397. doi:10.1097/00005392-199608000-00015

4. Shaeer O, Shaeer K, el-Sebaie A. "Minimizing the Losses in Penile Lengthening: 'V-Y Half-Skin Half-Fat Advancement Flap' and 'T-Closure' Combined With Severing the Suspensory Ligament." J Sex Med. 2006;3(1):155–160. doi:10.1111/j.1743-6109.2005.00105.x

5. Alexander A, Lorenzo AJ, Salle JL, Rode H. "The Ventral V-Plasty: A Simple Procedure for the Reconstruction of a Congenital Megaprepuce." J Pediatr Surg. 2010;45(8):1741–1747. doi:10.1016/j.jpedsurg.2010.03.033

6. Shamout S, Yao HHI, Mossa AH, Carlson KV, Baverstock RJ. "Persistent Storage Symptoms Following Y-V Plasty Reconstruction for the Treatment of Refractory Bladder Neck Contracture." Neurourol Urodyn. 2022;41(5):1082–1090. doi:10.1002/nau.24941

7. 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

8. 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

9. Sennert M, Fawzy M, Wirmer J, Graumann C, Hadidi AT. "Y-V Meatoplasty: A Simple Novel Technique to Correct Meatal Stenosis." J Sex Med. 2025. doi:10.1093/jsxmed/qdaf236

10. 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

11. El-Khatib HA. "V-Y Fasciocutaneous Pudendal Thigh Flap for Repair of Perineum and Genital Region After Necrotizing Fasciitis: Modification and New Indication." Ann Plast Surg. 2002;48(4):370–375. doi:10.1097/00000637-200204000-00006

12. Alammar A, Laing K, Somasundaram J, Wallace DL, Rogers AD. "Flap Reconstruction Following Fournier's Gangrene: A Systematic Review of Techniques and Outcomes." Burns. 2026;52(3):107888. doi:10.1016/j.burns.2026.107888

13. Myers PL, Krasniak PJ, Day SJ, Bossert RP. "Gluteal Flaps Revisited: Technical Modifications for Perineal Wound Reconstruction." Ann Plast Surg. 2019;82(6):667–670. doi:10.1097/SAP.0000000000001771

14. Höckel M, Dornhöfer N. "Vulvovaginal Reconstruction for Neoplastic Disease." Lancet Oncol. 2008;9(6):559–568. doi:10.1016/S1470-2045(08)70147-5

15. Saito A, Sawaizumi M, Matsumoto S, Takizawa K. "Stepladder V-Y Advancement Medial Thigh Flap for the Reconstruction of Vulvoperineal Region." J Plast Reconstr Aesthet Surg. 2009;62(7):e196–e199. doi:10.1016/j.bjps.2009.01.090

16. Lee PK, Choi MS, Ahn ST, et al. "Gluteal Fold V-Y Advancement Flap for Vulvar and Vaginal Reconstruction: A New Flap." Plast Reconstr Surg. 2006;118(2):401–406. doi:10.1097/01.prs.0000227683.47836.28

17. Lee JH, Shin JW, Kim SW, et al. "Modified Gluteal Fold V-Y Advancement Flap for Vulvovaginal Reconstruction." Ann Plast Surg. 2013;71(5):571–574. doi:10.1097/SAP.0b013e31824f23e4

18. Sakamoto Y, Nakajima H, Imanishi N, Kishi K. "The Interrupted V-Y Advancement Flap for the Reconstruction of the Vulvovaginal Defect." Int J Dermatol. 2013;52(9):1125–1128. doi:10.1111/ijd.12069

19. Jaiswal D, Belgaumwala T, Shankhdhar VK, et al. "Perforator-Based Pentagonal V-Y Advancement Skin and Subcutaneous Flap: A Solution for Pelvic and Vaginal Reconstruction After Surgery for Anorectal Cancers." Ann Plast Surg. 2025. doi:10.1097/SAP.0000000000004507

20. Frigerio M, Barba M, Volontè S, et al. "Total Introital Obliteration as a Consequence of Lichen Sclerosus: A Rare Cause of Urinary Retention." Int Urogynecol J. 2023;34(3):779–781. doi:10.1007/s00192-022-05356-6

21. Rouzier R, Haddad B, Deyrolle C, et al. "Perineoplasty for the Treatment of Introital Stenosis Related to Vulvar Lichen Sclerosus." Am J Obstet Gynecol. 2002;186(1):49–52. doi:10.1067/mob.2002.119186

22. Rangatchew F, Knudsen J, Thomsen MV, Drzewiecki KT. "Surgical Treatment of Disabling Conditions Caused by Anogenital Lichen Sclerosus in Women." J Plast Reconstr Aesthet Surg. 2017;70(4):501–508. doi:10.1016/j.bjps.2016.12.008

23. Gebhart JB, Schmitt JJ. "Surgical Management of the Constricted or Obliterated Vagina." Obstet Gynecol. 2016;128(2):284–291. doi:10.1097/AOG.0000000000001495

24. Lenoir P, Lallemant M, Vilchez M, Ramanah R. "V-Y Advancement Flap to Correct a Perineal Defect After an Episiotomy Dehiscence." Int Urogynecol J. 2021;32(7):1935–1937. doi:10.1007/s00192-020-04658-x

25. Miles T, Johnson N. "Vaginal Dilator Therapy for Women Receiving Pelvic Radiotherapy." Cochrane Database Syst Rev. 2014;(9):CD007291. doi:10.1002/14651858.CD007291.pub3

26. Clifton MM, Gurunluoglu R, Pizarro-Berdichevsky J, Baker T, Vasavada SP. "Treatment of Vaginal Stenosis With Fasciocutaneous Singapore Flap." Int Urogynecol J. 2017;28(3):493–495. doi:10.1007/s00192-016-3156-8

27. Denton AS, Maher EJ. "Interventions for the Physical Aspects of Sexual Dysfunction in Women Following Pelvic Radiotherapy." Cochrane Database Syst Rev. 2003;(1):CD003750. doi:10.1002/14651858.CD003750

28. Calpin GG, Davey MG, Maguire B, et al. "Optimal approaches to flap reconstruction following abdominoperineal resection: A systematic review." Surgeon. 2025;23(3):155–161. doi:10.1016/j.surge.2025.01.010

29. Kirtschig G, Woelber L, Günthert A, et al. "Evidence- and consensus-based guideline on lichen sclerosus." J Dtsch Dermatol Ges. 2026;24(4):566–584. doi:10.1111/ddg.70000

30. Di Donato V, Giannini A, Galli V, et al. "Role of V-Y flap reconstruction in vulvar cancer patients: multicenter retrospective study." Int J Gynecol Cancer. 2024;34(8):1133–1139. doi:10.1136/ijgc-2024-005486

31. Chavan RN, Saklani AP, Desouza AL, et al. "V-Y gluteal advancement fasciocutaneous flap for reconstruction of perineal defects after surgery for anorectal cancers—a single-center experience." Indian J Surg Oncol. 2021;12(2):241–245. doi:10.1007/s13193-021-01311-x