Limberg (Rhomboid) Flap for Vulvar Reconstruction
The Limberg (rhomboid) flap is a local random-pattern transposition flap based on precise geometric principles described by Alexander Limberg in 1928. In vulvar reconstruction it is indicated primarily for small-to-moderate defects of the anterior or posterior commissure, particularly after posterior vulvar field resection (VFR).[1][2]
For the broader treatment menu see the Vulvar Reconstruction Atlas. For the underlying flap geometry see the foundations Rhomboid (Limberg) Flap page. For adjacent techniques see Vulvar Primary Closure and the V-Y Advancement, Lotus Petal, and Singapore (pudendal-thigh) flaps.
Historical Context
The Limberg flap was among the earliest reconstructive techniques applied to vulvar defects, with its potential recognized in the 1950s–60s. It was the first description of a rhomboid random-pattern skin flap — developed from mathematical principles — applied to the vulvar region. The first dedicated vulvar series was Barnhill et al. (1983), followed by larger series in the 1990s.[1][3]
Geometric Design and Principles
The classic Limberg flap is based on a rhombus (parallelogram) with internal angles of 60° and 120°:[4][5]
- The defect is converted (or planned) into a rhomboid with four equal sides and 60° / 120° internal angles.
- The short diagonal is extended by a distance equal to the side length.
- A second incision is made from the end of that extension, parallel to the nearest side of the rhombus and of equal length.
- The triangular flap is transposed (rotated) into the defect; the donor site is closed primarily.
- Four possible flap orientations exist for any rhomboid defect — the optimal one is chosen so that the donor-site closure aligns with the line of maximal extensibility (LME) of the surrounding tissue, which should be perpendicular to the relaxed skin-tension lines.[5][6]
Geometric constraints:
- 1:1 length-to-width ratio — inherently safe vascularly.[4]
- Random-pattern flaps require a base width ≥ 50% of flap length, which limits flap size, advancement distance, and rotation arc.[1]
- Design can be aligned with local tension lines — a particular advantage in the vulva.[1]
Dufourmentel modification
The Dufourmentel modification widens the flap angle, allowing closure of defects with angles between 60° and 90°. The distance between the critical tension points A and B is 20% smaller in the Dufourmentel design — reducing tension at the flap edge and improving rotation.[7][8]
Multiple Limberg flaps
Up to four neighboring Limberg flaps can be arranged around a single large rhomboid defect — the geometric limit of the technique.[9]
Indications in Vulvar Reconstruction
The Limberg flap occupies a specific niche in vulvar algorithms:[1][10][11]
| Defect | Use of Limberg |
|---|---|
| Anterior commissure | Limberg or anterior labial flap |
| Posterior commissure | Bilateral Limberg flaps preferred after posterior VFR[10] |
| Peripheral commissural | Limberg preferred over labial flaps for more peripherally located defects[1] |
| Unilateral vs bilateral | Determined by defect size[1] |
Not appropriate for:
- Large lateral / hemivulvectomy defects → use V-Y advancement or pudendal-thigh flaps.
- Total vulvectomy defects → use bilateral V-Y, pubolabial V-Y, or bilateral pudendal-thigh flaps.
- Extended defects involving inguinal, gluteal, or anterior abdominal regions → use musculocutaneous flaps.[1][11]
Surgical Technique in the Vulva
Barnhill et al. (1983) — first dedicated vulvar series
- Primary closure of vulvar excisions is usually satisfactory in the anterior vulva where skin is mobile.[3]
- In the posterior / posterolateral vulva, primary closure under tension leads to wound breakdown, scar formation, and dyspareunia.
- The rhomboid flap eliminates tension by transposing adjacent tissue into the defect.
- Single or multiple rhomboid flaps can be used depending on defect size.
Burke et al. (1994) — largest early series
- 15 flaps in 13 patients; flap sizes 2.5 × 2.5 cm to 6 × 6 cm.[12]
- Partial primary closure was combined with flap construction in 11/13 patients (84.6%) — the Limberg is often used as an adjunct to primary closure rather than the sole reconstructive technique.
- Applied to radical vulvectomy, wide local excision, and excision of recurrent disease.
Höckel et al. (2018) — vulvar field resection (VFR) trial
Used bilateral Limberg flaps specifically after posterior VFR, matching other flap types to other VFR patterns:[10]
| VFR pattern | Reconstruction |
|---|---|
| Posterior VFR | Bilateral Limberg flaps |
| Anterior VFR | Pubolabial V-Y advancement |
| Interior VFR | Anterior- / posterior-based labial flap |
| Total / extended VFR | Bilateral pudendal-thigh, medial-thigh V-Y, or gluteal-fold V-Y |
Outcomes
| Study | Flaps | Complications | Headline |
|---|---|---|---|
| Barnhill 1983[3] | 8 (n = 8) | Not detailed | First vulvar series; demonstrated feasibility |
| Helm 1993[13] | 15 | 13/15 (87%) complete healing or insignificant separation; 2 major breakdowns (both healed without reoperation) | 14/15 patients had adequate introital caliber; 1 introital stenosis |
| Burke 1994[12] | 15 (n = 13) | 2 minor wound separations (13%); no other complications | All 6 partnered women resumed sexual activity |
| Tock 2019[14] | Rhomboid cohort | 41% reoperation rate; median 17-day LOS | Higher reoperation than V-Y (25%); lower than gluteal-thigh (69%) |
Functional outcomes:
- Burke 1994 — all six partnered patients resumed sexual activity.[12]
- Helm 1993 — 14/15 patients had adequate introital caliber for speculum passage; 1 introital stenosis.[13]
- Höckel VFR trial — reconstruction goals (symmetrical longitudinal perineal folds, adequate introital size, preserved pudendal / genitofemoral innervation) were achieved.[10]
Comparison vs Other Vulvar Flaps
| Parameter | Limberg | V-Y Advancement | Gluteal-Thigh |
|---|---|---|---|
| Median hospital stay | 17 d | 14 d | 24 d |
| Reoperation rate | 41% | 25% | 69% |
| Most common complication | Partial necrosis | Partial necrosis | Partial necrosis |
| Overall / recurrence-free survival | Comparable | Comparable | Comparable |
V-Y advancement demonstrated shorter LOS and lower reoperation than Limberg in the Tock 2019 comparison, leading the authors to favor V-Y as procedure of choice when the defect is too large for primary closure.[14] Limberg remains valuable for smaller commissural defects where V-Y is unnecessary.[1]
Advantages and Limitations
| Advantage | Detail |
|---|---|
| Simple geometric design | Easy to learn and execute[5][15] |
| Design flexibility | Four possible orientations per defect[5] |
| Minimal morbidity | Low complication rate for appropriately sized defects[12] |
| No additional donor-site morbidity | Adjacent donor closed primarily |
| Preserves tissue planes | No muscle sacrifice |
| Adjunct to primary closure | Used when primary closure alone would be under tension[12] |
| Functional / cosmetic results | Maintains introital caliber; allows resumption of sexual activity[12][13] |
| Limitation | Detail |
|---|---|
| Size cap | Random vascularization restricts the flap to small / moderate defects (≤ ~6 × 6 cm)[1][12] |
| Higher reoperation than V-Y for larger defects | 41% vs 25%[14] |
| Dog-ear at pivot point | Known complication[8] |
| No tissue bulk | Skin coverage only — not suitable for deep defects |
| Location-restricted | Lateral / total / extended defects require other flap types[1] |
Key Takeaways
- Geometrically precise random-pattern transposition flap with a long vulvar track record dating to the 1950s.[1]
- Best suited for small-to-moderate posterior and anterior commissural defects — particularly after posterior VFR.[1][10]
- Often used as an adjunct to primary closure rather than as the sole reconstructive technique.[12]
- Complication rates are low for appropriately selected defects (~13% minor wound separation in the largest series); reoperation rates are higher than V-Y for larger defects.[12][14]
- For defects beyond the commissural region or exceeding ~6 cm, V-Y advancement, lotus petal, or perforator flaps are preferred.[1][14]
References
1. Höckel M, Dornhöfer N. Vulvovaginal reconstruction for neoplastic disease. Lancet Oncol. 2008;9(6):559–568. doi:10.1016/S1470-2045(08)70147-5
2. Goldman A, Wollina U. The Limberg rhomboid flap: history, creator, and importance in plastic surgery. Clin Dermatol. 2026. doi:10.1016/j.clindermatol.2026.01.013
3. Barnhill DR, Hoskins WJ, Metz P. Use of the rhomboid flap after partial vulvectomy. Obstet Gynecol. 1983;62(4):444–447.
4. Fansa H, Linder S. The local rhombus-shaped flap — an easy and reliable technique for oncoplastic breast cancer surgery and defect closure in breast and axilla. Cancers. 2024;16(17):3101. doi:10.3390/cancers16173101
5. Borges AF. The rhombic flap. Plast Reconstr Surg. 1981;67(4):458–466. doi:10.1097/00006534-198104000-00007
6. Hwang K, Yoon JM, Park TJ, Park CY. Teaching models for correct rhombic flaps. J Craniofac Surg. 2023;34(7):2161–2162. doi:10.1097/SCS.0000000000009349
7. Rajabi A, Dolovich AT, Johnston JD. From the rhombic transposition flap toward Z-plasty: an optimized design using the finite element method. J Biomech. 2015;48(13):3672–3678. doi:10.1016/j.jbiomech.2015.08.021
8. Imafuku K, Hata H, Yamaguchi Y, et al. Modified Dufourmentel flap, easy to design and tailor to the defect. J Dermatol. 2017;44(1):68–70. doi:10.1111/1346-8138.13568
10. Turan T, Kuran I, Ozcan H, Baş L. Geometric limit of multiple local Limberg flaps: a flap design. Plast Reconstr Surg. 1999;104(6):1675–1678. doi:10.1097/00006534-199911000-00010
11. Höckel M, Trott S, Dornhöfer N, et al. Vulvar field resection based on ontogenetic cancer field theory for surgical treatment of vulvar carcinoma: a single-centre, single-group, prospective trial. Lancet Oncol. 2018;19(4):537–548. doi:10.1016/S1470-2045(18)30109-8
12. 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
13. Burke TW, Morris M, Levenback C, Gershenson DM, Wharton JT. Closure of complex vulvar defects using local rhomboid flaps. Obstet Gynecol. 1994;84(6):1043–1047.
14. Helm CW, Hatch KD, Partridge EE, Shingleton HM. The rhomboid transposition flap for repair of the perineal defect after radical vulvar surgery. Gynecol Oncol. 1993;50(2):164–167. doi:10.1006/gyno.1993.1186
15. Tock S, Wallet J, Belhadia M, et al. Outcomes of the use of different vulvar flaps for reconstruction during surgery for vulvar cancer. Eur J Surg Oncol. 2019;45(9):1625–1631. doi:10.1016/j.ejso.2019.04.012
16. Fee WE, Gunter JP, Carder HM. Rhomboid flap principles and common variations. Laryngoscope. 1976;86(11):1706–1711. doi:10.1288/00005537-197611000-00013