Labia Majora Fasciocutaneous Flap
The labia majora fasciocutaneous flap is a full-thickness pedicled flap from the labia majora — distinct from the Martius flap, which harvests only the labial fat pad. Where the Martius contributes a vascularized interposition layer, the labia majora fasciocutaneous flap contributes actual vaginal wall tissue — skin, subcutaneous fat, and underlying dartos-like fascia — to reconstruct the anterior vaginal wall itself.[1]
It is the operation of choice for complex urogynecologic fistulas with concomitant vaginal-wall deficit — the scenario where fistula closure alone would leave an inadequate, rigid, or absent vagina.
Vascular Basis
The labia majora receives dual blood supply:
- Anterior labial artery (branch of the external pudendal artery) — supplies the anterior one-third
- Posterior labial artery (branch of the internal pudendal artery) — supplies the posterior two-thirds
Either pedicle can be chosen depending on the reconstruction direction. Posterior-based flaps are most common in vesicovaginal and urethrovaginal fistula reconstruction because the axis of rotation points toward the vaginal introitus.
The dense epifascial and subfascial arterial network of the perineal region allows these flaps to be designed as peninsula or island flaps with considerable design flexibility, retaining sensory innervation of the corresponding perineal dermatome — a significant advantage for functional reconstruction.[2][3]
Rothenberger 2025 cadaveric neurovascular mapping (10 cadavers) showed the highest vascular density at the lateral aspect of the labial fat pad and the highest nerve density anterior and medial bilaterally — supporting a lateral approach to dissection that optimizes vascular preservation while minimizing nerve injury. The right labium had significantly greater vascular density (8% increase, p < 0.05).[4]
Contrast with the Martius flap, which uses the same vascular system but harvests only the fat pad — not the overlying skin and fascia.
Indications
The defining indication is a complex urogynecologic fistula with vaginal deficit — situations where the vagina itself is inadequate and the defect requires tissue replacement, not just interposition.[1]
- Complex VVF with rigid, non-capacious, radiated vagina — labia majora tissue augments both the fistula repair and the vaginal wall
- Urethrovaginal fistula with anterior vaginal wall loss and stenosis — restores vaginal caliber while closing the fistula
- Vesicolabial fistula — the fistula tract communicates with the labia; flap repair is natural
- Recurrent VVF after failed Martius interposition — escalation to full-thickness tissue replacement
- Post-obstetric or post-radiation vaginal-wall loss where vaginal reconstruction is needed concurrent with fistula closure
Harvest and Technique
Design
- Flap outlined on the labia majora on one side (or bilaterally for larger defects)
- Full-thickness flap including skin, subcutaneous fat, underlying fibrofatty tissue, and investing fascia
- Pedicle preserved posteriorly (posterior labial a.) or anteriorly (anterior labial a.) depending on required reach
- Flap dimensions tailored to the vaginal defect — typically 4–6 cm wide × 5–8 cm long
Dissection
- Perineotomy or vaginal dissection to expose the fistula and the deficient vaginal wall
- Close the fistula (cystorrhaphy, urethrorrhaphy) with a standard technique
- Elevate the labia majora flap from distal to proximal, staying above the pubic periosteum and sparing the pedicle
- Identify and preserve the labial artery and its venae comitantes on the undersurface of the flap
- Tunnel the flap beneath the perineal skin to the vaginal defect
- Inset as vaginal wall replacement — the flap skin becomes neovaginal epithelium
- Donor site closed primarily in most cases; may require local rotation advancement if large
Principle
The labia majora fasciocutaneous flap simultaneously (1) covers the fistula repair with a vascularized interposition layer (like a Martius) and (2) provides actual vaginal wall tissue — skin and fascia replacing the missing vaginal surface. This dual contribution is what distinguishes it from the Martius flap, which provides only interposition.
Outcomes — Complex Urogynecologic Fistula
Gupta 2022 series (7 patients, complex urogynecologic fistulas):[1]
- Successful closure in 6/7 patients
- One patient required subsequent colpocleisis (not suitable for flap reconstruction)
- Patients achieved capacious vagina with return of regular menstrual cycles (in premenopausal patients)
- Complications: limited; minor wound issues at donor site managed with local care
Vulvar Reconstruction After Oncologic Resection
Labial fasciocutaneous flaps are a key component of the reconstructive armamentarium for vulvar cancer defects:[2][3][5][6]
- Small-to-medium vulvar defects — island V-Y flaps from the pubolabial region are considered the "workhorse flap" for vulvar reconstruction owing to their versatility, reliability, and low complication rate.[6]
- Anterior / posterior commissure defects — anteriorly or posteriorly based labial flaps as appropriate.[2]
- Hemivulvectomy defects — unilateral labial or pudendal-thigh flaps.[2]
- Total vulvectomy defects — bilateral labial flaps or the pubolabial V-Y amplified flap of Moschella and Cordova, which can restore the entire vulva with a single flap by combining downward advancement with bilateral medial rotation.[2][3]
- Salgarello 2005 algorithm structures flap selection by defect dimensions and location.[6]
Kwong 2025 prospective 136-flap / 69-patient locoregional flap reconstruction series:[5]
- 92.6% of flaps with none-to-mild complications at 7 days
- 83.1% with none-to-mild complications at 30 days
- Significant improvement in genital symptoms, urinary continence, sexual activity, and body image at 12 months
Al-Benna 2012 — postablative vulvar reconstruction with local fasciocutaneous flaps and superficial-fascial-system repair achieved durable closure with low complication rates.[7]
Vaginoplasty and Neovagina Creation
- Flack 1993 — tubularized labia minora flap + Lucite dilator for Müllerian agenesis. Provides non-hair-bearing epithelial lining without abdominal surgery or skin grafting.[8]
- Belloli 1997 expanded labial-skin-flap vaginoplasty — tissue expanders placed in the labia generate sufficient tissue for a large, well-vascularized neovagina using non-hair-bearing labial skin, obviating postoperative dilation and preventing delayed strictures.[9]
- Partial vaginal defects — labial flaps are well suited to functionally important small-volume vaginal defects, such as those resulting from fistula excision.[2]
Tubularized Labial Urethroplasty for Complex Female Stricture
Xu 2009 — 8 patients with complex female urethral strictures associated with urethrovaginal fistulas after pelvic-fracture urethral injury treated with transpubic access + tubularized labial skin flap urethroplasty. The flap was tubularized over a stent to create a neourethra:[10]
- No postoperative complications
- Normal micturition in 7 of 8 patients at mean 48-month follow-up
- A salvage option when local urethral plate is destroyed and BMG alone is insufficient
Recurrent Urethrovaginal Fistula
Candiani 1993 — island bulbocavernosus musculocutaneous flap (incorporating skin from the labium majus) for anterior vaginal-wall reconstruction after urethral repair in recurrent urethrovaginal fistulas where perilesional scarring and vaginal-wall loss preclude direct closure.[11]
Perineal Reconstruction
Windhofer 2011 — local fasciocutaneous infragluteal flap (a variant of the labial / perineal fasciocutaneous family) for perineal reconstruction after rectal / anal cancer resection and Crohn's disease. 13 of 14 patients achieved complete healing.[12]
Design Variations
| Flap design | Vascular basis | Best indication | Key feature |
|---|---|---|---|
| Anteriorly based labial flap | External pudendal arteries | Posterior commissure, RVF | Rotates posteriorly[2] |
| Posteriorly based labial flap | Posterior labial artery (internal pudendal) | Anterior defects, urethral pathology, VVF | Rotates anteriorly[2] |
| Pubolabial V-Y amplified flap (Moschella–Cordova) | Deep pubic arterial network | Total vulvectomy defects | Single flap restores entire vulva; bilateral medial rotation[3] |
| Island fasciocutaneous flap (gluteal fold) | Pudendal artery perforators | Hemivulvectomy, posterior defects | Scar hidden in gluteal fold; sensate[12] |
| Composite fasciocutaneous + fat pad | Dual pudendal supply | Complex fistula with vaginal deficit | Provides both epithelial surface and interposition[1] |
| Tubularized labial flap | Labial vascular pedicle | Female urethral stricture / PFUI fistula | Creates neourethra[10] |
| Tissue-expanded labial-skin flap | Labial vascular pedicle | Müllerian agenesis vaginoplasty | Generates large non-hair-bearing neovaginal lining[9] |
Advantages
- Tissue replacement, not just interposition — addresses vaginal deficit and fistula in one operation
- Full-thickness vascularized tissue — robust take in radiated or fibrotic fields
- Donor site in the operative field — no distant harvest
- Bilateral harvest possible — for very large vaginal deficits
Limitations
- Female patients only — technique is anatomy-specific
- Labial disfigurement/asymmetry at the donor site — significant counseling point
- Hair-bearing — the flap skin carries labial hair into the neovagina; can be managed with preoperative hair removal or accepted
- Bilateral harvest doubles donor morbidity — reserved for the largest defects
- Limited tissue volume compared with thigh-based flaps for very large defects
Comparison with Martius Flap
| Feature | Martius Flap | Labia Majora Fasciocutaneous |
|---|---|---|
| Tissue harvested | Labial fat pad only | Skin + fat + fascia (full-thickness) |
| Primary role | Interposition layer between repaired planes | Vaginal wall tissue replacement |
| Donor morbidity | Modest; labial contour change | Visible labial asymmetry |
| Best for | Complex VVF without vaginal-wall deficit | Complex VVF with vaginal-wall deficit |
| Bilateral | Possible for larger interposition | Possible for large vaginal reconstruction |
The two flaps are complementary — Martius is the first choice when the vagina is adequate and only interposition is needed; the labia majora fasciocutaneous flap is the choice when the vagina itself must be reconstructed.
Comparison with Other Local Vulvovaginal / Urogenital Flaps
| Flap | Tissue type | Skin island | Sensate | Best for | Limitations |
|---|---|---|---|---|---|
| Labia majora fasciocutaneous | Fasciocutaneous ± fat pad | Yes | Yes | Fistula with vaginal deficit; vulvar defects | Limited volume; hair-bearing |
| Martius (labial fat pad) | Fibroadipose only | No | No | Fistula interposition; sling erosion | No epithelial surface |
| Singapore / pudendal-thigh | Fasciocutaneous | Yes | Yes | Partial vaginal defects; vulvar | Bulky base; hair growth |
| Lotus petal (infragluteal) | Fasciocutaneous | Yes | Yes | Vulvar / perineal defects | Limited reach anteriorly |
| Gracilis musculocutaneous | Musculocutaneous | Yes | Limited | Large / extended defects; neovagina | Bulky; thigh donor morbidity |
| VRAM | Musculocutaneous | Yes | No | Pelvic exenteration; large defects | Abdominal-wall morbidity; hernia risk |
Technical Pearls
- Preoperative hair removal on the planned flap skin reduces neovaginal hair growth
- Identify the labial artery Doppler-wise before incision in re-operative or scarred fields
- Donor-site closure benefits from a small lateral undermining to reduce tension
- Stenting or packing the vagina postoperatively for 5–7 days supports flap inset and prevents contraction
See Also
- Martius flap — interposition counterpart
- Flaps in GU Reconstruction
- Vesicovaginal fistula
- Vesicovaginal fistula
References
1. Gupta P, Kalra S, Dorairajan LN, et al. "Labia Majora Fasciocutaneous Flap Reconstruction in Complex Urogynecological Fistulas With Vaginal Deficit — A Versatile Approach." Urology. 2022;167:241–246. doi:10.1016/j.urology.2022.05.017
2. Höckel M, Dornhöfer N. "Vulvovaginal Reconstruction for Neoplastic Disease." Lancet Oncol. 2008;9(6):559–568. doi:10.1016/S1470-2045(08)70147-5
3. Moschella F, Cordova A. "Innervated Island Flaps in Morphofunctional Vulvar Reconstruction." Plast Reconstr Surg. 2000;105(5):1649–1657. doi:10.1097/00006534-200004050-00008
4. Rothenberger RW, Feroz R, Hogarth N, et al. "Neurovascular Mapping of the Labial Fat Pad: Implications for Optimal Martius Flap Harvest." Int Urogynecol J. 2025. doi:10.1007/s00192-025-06383-9
5. Kwong FL, Pounds R, Farah Y, Yap JKW. "Vulval Flap Reconstruction in Women With Benign, Preneoplastic and Malignant Vulval Conditions: A Prospective Study." BJOG. 2025;132(8):1156–1165. doi:10.1111/1471-0528.18156
6. Salgarello M, Farallo E, Barone-Adesi L, et al. "Flap Algorithm in Vulvar Reconstruction After Radical, Extensive Vulvectomy." Ann Plast Surg. 2005;54(2):184–190. doi:10.1097/01.sap.0000141381.77762.07
7. Al-Benna S, Tzakas E. "Postablative Reconstruction of Vulvar Defects With Local Fasciocutaneous Flaps and Superficial Fascial System Repair." Arch Gynecol Obstet. 2012;286(2):443–448. doi:10.1007/s00404-012-2262-1
8. Flack CE, Barraza MA, Stevens PS. "Vaginoplasty: Combination Therapy Using Labia Minora Flaps and Lucite Dilators — Preliminary Report." J Urol. 1993;150(2 Pt 2):654–656. doi:10.1016/s0022-5347(17)35575-1
9. Belloli G, Campobasso P, Musi L. "Labial Skin-Flap Vaginoplasty Using Tissue Expanders." Pediatr Surg Int. 1997;12(2–3):168–171.
10. Xu YM, Sa YL, Fu Q, et al. "Transpubic Access Using Pedicle Tubularized Labial Urethroplasty for the Treatment of Female Urethral Strictures Associated With Urethrovaginal Fistulas Secondary to Pelvic Fracture." Eur Urol. 2009;56(1):193–200. doi:10.1016/j.eururo.2008.04.046
11. Candiani P, Austoni E, Campiglio GL, et al. "Repair of a Recurrent Urethrovaginal Fistula With an Island Bulbocavernous Musculocutaneous Flap." Plast Reconstr Surg. 1993;92(7):1393–1396.
12. Windhofer C, Michlits W, Heuberger A, Papp C. "Perineal Reconstruction After Rectal and Anal Disease Using the Local Fascio-Cutaneous-Infragluteal Flap: A New and Reliable Technique." Surgery. 2011;149(2):284–290. doi:10.1016/j.surg.2009.10.040