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Rhomboid (Limberg) Flap

The rhomboid (Limberg) flap is a transposition flap built on precise geometric principles that allow tension-free closure of defects not amenable to straight-line repair. First described in 1928 by the Russian surgeon Alexander Alexandrovich Limberg, it remains one of the most versatile and widely used local flap techniques in reconstructive surgery, with established niches across pilonidal disease, vulvar reconstruction, and select genital and perineal applications.[1][2]

This page is the foundations-level deep dive. Site-specific pages — vulvar reconstruction, scrotal reconstruction, Fournier's reconstruction — link back here.

Geometric Principle​

The Limberg flap is built around a rhombus (equilateral parallelogram) with angles of 60° and 120°. The defect is either created as or converted into a rhomboid shape, and the flap is designed as follows:[2][3][4]

  1. The short diagonal of the rhombus is extended by a length equal to one side of the rhombus.
  2. A second incision is made from the end of this extension, parallel to the adjacent side, also equal in length to one side.
  3. This creates a second rhombus adjacent to the defect.
  4. The flap is elevated, transposed into the defect, and the donor site is closed primarily.

Because a rhombus has two diagonals and four sides, four possible Limberg flaps can be designed for any given rhomboid defect. The correct flap is chosen based on the line of maximal extensibility (LME) — the direction perpendicular to the relaxed skin tension lines (RSTLs) — to minimize closure tension and optimize scar orientation.[2][3]

Key geometric properties​

PropertyDetail
Length-to-width ratio1:1 — inherently safe under axial-pattern perfusion[4]
Random-pattern vascularizationRequires base width ≥ 50% of flap length, which the standard Limberg design satisfies[5]
Stress redistributionFinite-element modeling shows an optimized rhombic design (approaching Z-plasty geometry) reduces peak von Mises stress by 43% vs. standard Limberg and 53% vs. Dufourmentel[7]

Limberg vs. Dufourmentel​

The Dufourmentel flap (1962) is the principal modification of the Limberg:[8][9]

  • Widens the base of the transposition flap to improve vascularization
  • Accommodates defects with angles other than the strict 60° / 120° of the Limberg design
  • A 2024 Cochrane review found little to no difference between modified Limberg and standard Limberg flaps in pilonidal disease for recurrence, infection, dehiscence, or return to work[10]
  • Both are classified as "rhombic transposition flaps" and share the same fundamental geometric principle

Pilonidal Sinus Disease — the signature application​

The Limberg flap is most extensively studied in sacrococcygeal pilonidal sinus disease (PSD), the prototypical off-midline rotational closure. Excision of a rhomboid area down to the presacral fascia is followed by transposition of a gluteus-maximus rotational flap medially to cover the defect.[11]

Outcomes in PSD​

OutcomeResult
Network meta-analysis of 39 RCTs (5,061 patients)Modified Limberg flap and off-midline closure had the lowest recurrence of all PSD interventions[12]
Meta-analysis of 11,730 RCT patientsLimberg / Dufourmentel recurrence 0.6% at 12 mo and 1.8% at 24 mo[13]
Global seriesLimberg / Dufourmentel recurrence 0.3% at 12 mo (95% CI 0.2–0.4)[14]
Arnous RCT (n = 60)Limberg flap vs. primary midline closure: 0% vs. 20% recurrence (p < 0.05)[15]
Karydakis vs. Limberg meta (15 RCTs, 2,000 patients)No significant differences in pain, LOS, healing time, or recurrence[11]

Wound-complication rates with Limberg flap in PSD range from 0% to 26.5% — primarily hematoma / seroma and dehiscence from the large area of tissue mobilization.[11]

PSD is a colorectal indication, but the rhomboid-flap craft developed there directly informs its use in genital and perineal reconstruction.

Urologic Applications​

Epispadias-exstrophy complex — penile elongation and genital reconstruction​

The earliest described urologic application is in the epispadias-exstrophy complex. Kramer and Jackson (1986) described bilateral rhomboid flaps for penile elongation and genital reconstruction in 10 young males:[16]

  • The technique accurately defines the penopubic angle
  • Lower risk of injury to the verumontanum and ejaculatory ducts than alternative approaches
  • Cosmetic and functional results were satisfactory in all patients

The flap transposes tissue from the suprapubic region onto the dorsal penile shaft, lengthening the penis while redistributing skin tension — the same geometric logic used in pilonidal disease applied to a different anatomic plane.

Scrotal and perineal reconstruction​

The rhomboid flap belongs to the local-flap toolkit for scrotal defects after oncologic resection. In a 2025 systematic review of plastics involvement in urologic cancer reconstruction, rhomboid and other local-flap techniques were used in 33% of scrotal SCC and 67% of extramammary Paget's disease cases undergoing Mohs surgery.[17] Its geometric predictability suits the irregular contours of the scrotum and perineum.

Perineal reconstruction after Fournier's gangrene​

V-Y advancement and pudendal-thigh flaps are more commonly described in Fournier's reconstruction, but the rhomboid flap can serve as an adjunct for smaller, well-defined perineal defects. A 2026 SR of 619 patients / 625 flaps for Fournier's reconstruction reported flap loss in only 1.6% of cases, with medial-thigh, pudendal-thigh, and gracilis flaps most commonly utilized.[18]

Urogynecologic Applications​

Vulvar reconstruction after oncologic resection​

The Limberg flap has a well-established role in vulvar reconstruction, particularly for small to moderate posterior defects.

Höckel and Dornhöfer's landmark review identifies the Limberg flap as one of 11 recommended procedures for classified vulvovaginal defects. Bilateral rhomboid (Limberg) flaps are recommended for:[6]

  • Anterior and posterior vulvar commissure defects
  • Peripheral vulvar defects (Limberg flaps preferred over labial flaps)
  • Unilateral or bilateral configurations depending on defect size

In the vulvar field resection (VFR) paradigm by Höckel et al. (2018), bilateral rhomboid (Limberg) flaps were used after posterior VFR, while V-Y advancement was used after anterior VFR and pudendal-thigh flaps after total / extended VFR.[19]

The flap's principal limitation is its random-pattern vascularization, which restricts functional size, distance of advancement, and arc of rotation — making it most useful for small defects designed along local tension lines.[6]

Comparative outcomes in vulvar cancer — rhomboid vs. V-Y vs. gluteal-thigh​

A single-center retrospective by Tock et al. (2019) compared three flap types in 61 patients undergoing radical vulvar surgery:[20]

ParameterGluteal-thigh flap (GTF)Rhomboid flap (RF)V-Y flap (VYF)p
Median hospital stay24 days17 days14 days0.002
60-day reoperation69%41%25%0.04
Most common complicationPartial necrosisPartial necrosisPartial necrosis—
Overall / recurrence-free survivalComparableComparableComparableNS

V-Y flaps appeared to be the procedure of choice for larger defects, with shorter LOS and lower reoperation rates. The rhomboid flap retains a niche for smaller, well-defined defects where its geometric precision is advantageous.[20]

A prospective study of 136 flaps in 69 women (rhomboid among the techniques used) for vulvectomy with locoregional flap reconstruction reported 92.6% of flaps with no or mild complications at 7 days, with significant 12-month improvements in genitourinary symptoms, urinary continence, sexual activity, and body image.[21]

Defect-based vulvar reconstruction algorithm​

Modern algorithms position the rhomboid flap within a hierarchy by defect location and size:[6][22][23]

  • Small posterior / commissure defects → bilateral Limberg (rhomboid) flaps
  • Lateral / hemivulvectomy defects → unilateral medial-thigh V-Y or pudendal-thigh flaps
  • Anterior defects → pubolabial V-Y advancement
  • Total vulvectomy defects → bilateral pudendal-thigh flaps or pubolabial V-Y amplified flap
  • Extended defects (inguinal / gluteal involvement) → musculocutaneous flaps (TFL, gracilis, VRAM, gluteal-thigh)

Comparison with Other Geometric Flap Techniques​

FeatureRhomboid (Limberg)Z-plastyY-V plastyV-Y advancement
MechanismTransposition into a rhomboid defectTransposition of two triangular flapsAdvancement along contracture axisAdvancement into a defect
Primary effectDefect coverage with tension redistributionScar reorientation up to 90°Tissue lengtheningTissue advancement
LengtheningMinimal50–70% (60° angle)ModerateModerate
VascularizationRandom pattern (base ≥ 50% length)Random (tip-necrosis risk)Pedicled advancementSubcutaneous or perforator-based
Best forSmall–moderate defects with adequate adjacent tissueCircumferential contractures, scar reorientationStenotic segments (BNC, UPJ)Perineal / vulvar defect filling, penile lengthening
Urologic nicheEpispadias-exstrophy, scrotal reconstructionHypospadias revision, phimosis, frenuloplastyBladder-neck contracture, UPJ obstructionPenile lengthening, Fournier's reconstruction
Urogynecologic nicheSmall posterior vulvar defectsTransverse vaginal septum, vaginal constriction—Vulvovaginal oncologic defects, perineal reconstruction

The rhomboid flap occupies a distinct niche: it is the simplest transposition flap to design and execute, requiring geometric planning rather than microsurgical skill, and provides reliable coverage of small to moderate defects where primary closure would create excessive tension. Its random-pattern vascularization caps its size, so for larger vulvar, perineal, or genital defects, axial-pattern or perforator-based flaps (V-Y advancement, pudendal-thigh, VRAM) are preferred.[6][20][22]

Technical Pearls​

  • Choose among the four possible flaps by aligning the donor-site closure with the line of maximal extensibility — not by surgeon habit. The "wrong" Limberg of the four still closes, but with maximal tension.[3]
  • Convert irregular defects to a true rhombus before designing the flap — small extensions of the resection are preferable to a geometrically incorrect flap.
  • Respect the 1:1 length-to-width ratio — larger flaps require axial perfusion (medial-thigh, pudendal-thigh) instead of a random-pattern Limberg.
  • In vulvar reconstruction, plan bilaterally for commissure defects — single Limberg coverage of midline commissures distorts contour and is rarely the right choice.[6]
  • Avoid in heavily irradiated fields — the random base lacks the perfusion reserve needed in irradiated tissue; consider a perforator-based or musculocutaneous flap instead.
  • Rajabi finite-element work suggests that nudging the Limberg geometry toward Z-plasty proportions can substantially reduce peak closure stress; useful when laxity is borderline.[7]

See Also​

References​

1. 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

2. Borges AF. "The Rhombic Flap." Plast Reconstr Surg. 1981;67(4):458–466. doi:10.1097/00006534-198104000-00007

3. 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

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. Calhoun KH, Seikaly H, Quinn FB. "Teaching Paradigm for Decision Making in Facial Skin Defect Reconstructions." Arch Otolaryngol Head Neck Surg. 1998;124(1):60–66. doi:10.1001/archotol.124.1.60

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

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. Moreno-Casas G, Pereira-González A, Rodríguez-Nevado I, et al. "Triple Dufourmentel Hexagonal Flap for Scalp Reconstruction." Exp Dermatol. 2023;32(5):694–698. doi:10.1111/exd.14764

9. Fee WE, Gunter JP, Carder HM. "Rhomboid Flap Principles and Common Variations." Laryngoscope. 1976;86(11):1706–1711. doi:10.1288/00005537-197611000-00013

10. Cai Z, Zhao Z, Ma Q, et al. "Midline and Off-Midline Wound Closure Methods After Surgical Treatment for Pilonidal Sinus." Cochrane Database Syst Rev. 2024;1:CD015213. doi:10.1002/14651858.CD015213.pub2

11. Gil LA, Deans KJ, Minneci PC. "Management of Pilonidal Disease: A Review." JAMA Surg. 2023;158(8):875–883. doi:10.1001/jamasurg.2023.0373

12. Bi S, Sun K, Chen S, Gu J. "Surgical Procedures in the Pilonidal Sinus Disease: A Systematic Review and Network Meta-Analysis." Sci Rep. 2020;10(1):13720. doi:10.1038/s41598-020-70641-7

13. Stauffer VK, Luedi MM, Kauf P, et al. "Common Surgical Procedures in Pilonidal Sinus Disease: A Meta-Analysis, Merged Data Analysis, and Comprehensive Study on Recurrence." Sci Rep. 2018;8(1):3058. doi:10.1038/s41598-018-20143-4

14. Doll D, Orlik A, Maier K, et al. "Impact of Geography and Surgical Approach on Recurrence in Global Pilonidal Sinus Disease." Sci Rep. 2019;9(1):15111. doi:10.1038/s41598-019-51159-z

15. Arnous M, Elgendy H, Thabet W, et al. "Excision With Primary Midline Closure Compared With Limberg Flap in the Treatment of Sacrococcygeal Pilonidal Disease: A Randomised Clinical Trial." Ann R Coll Surg Engl. 2019;101(1):21–29. doi:10.1308/rcsann.2018.0144

16. Kramer SA, Jackson IT. "Bilateral Rhomboid Flaps for Reconstruction of the External Genitalia in Epispadias-Exstrophy." Plast Reconstr Surg. 1986;77(4):621–631. doi:10.1097/00006534-198604000-00019

17. Dagi AF, Jones NE, Bogue JT. "The Role of Plastic Surgery in Urologic Cancer and Trauma Reconstruction: A Systematic Review." Ann Plast Surg. 2025. doi:10.1097/SAP.0000000000004500

18. 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

19. 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

20. 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

21. 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

22. Ricotta G, Russo SA, Ferron G, Meresse T, Martinez A. "The Toulouse Algorithm: Vulvar Cancer Location-Based Reconstruction." Int J Gynecol Cancer. 2025;35(4):100065. doi:10.1016/j.ijgc.2024.100065

23. Jędrasiak A, Juniewicz H, Raczek W, et al. "Reconstruction of the Vulva and Perineum — Comparison of Surgical Methods." J Clin Med. 2025;14(13):4456. doi:10.3390/jcm14134456