3R / SCIP Lymphatic Flap Transfer for Male Genital Elephantiasis
Radical reduction and reconstruction (3R) combines excision of advanced genital lymphedema, soft-tissue coverage, and an attempt to improve lymphatic drainage with a pedicled superficial circumflex iliac artery perforator (SCIP) flap. The initial seven-patient report is encouraging, but it does not establish cure, superiority over other reconstructions, or freedom from long-term compression and recurrence.[1]
For diagnosis and broader treatment selection, see Genital Lymphedema and Giant Penoscrotal Lymphedema. Related procedures include Complex Decongestive Therapy, Lymphaticovenous Anastomosis, Vascularized Lymph Node Transfer, Modified Charles Procedure, and Debulking Scrotoplasty.
What the Operation Transfers
The author's subsequent technical review describes 3R using the lymph-interpositional-flap transfer (LIFT) concept: mapped lymphatic collectors are retained in the flap's deep fat and directed toward preserved inguinal nodes around its pedicle. This should not be rewritten as routine harvesting of the inguinal nodes into the skin paddle.[2]
| Component | Intended contribution | Important distinction |
|---|---|---|
| Excision | Remove diseased skin and fibrotic subcutaneous tissue that conservative treatment will not reverse | Preserve the penis, urethra, neurovascular structures, testes, and cords; complete removal is not always anatomically possible |
| SCIP skin coverage | Reconstruct the scrotum and, when necessary, provide a separate thin penile skin paddle | A skin flap's survival does not demonstrate restored lymphatic drainage |
| SCIP-LIFT | Retain patent collectors in deep fat and align their cut ends with the affected recipient tissue | Reconnection depends on healing and lymphangiogenesis; this is not an immediately sutured lymphatic bypass |
These distinctions follow the published 3R technical description.[2] LYST, which deliberately incorporates nodes and afferent vessels, and other complete-system transfer variants should be described according to their own operative design. Neither the SCIP name nor a shared vascular pedicle makes these operations interchangeable. See LYST and Complete Functional Lymphatic System Pedicled Transfer.[3][4]
Selection and Planning
Consider this combined approach for substantial scrotal or penoscrotal disease with fibrotic tissue and damaged skin requiring excision, when an appropriate groin donor site and specialist reconstructive expertise are available. Stage labels alone do not select a flap. Establish the cause of swelling, assess associated leg disease and the condition of both groins, treat active infection, and agree on functional goals and realistic follow-up. Conservative care remains part of the overall treatment plan.[2][5]
- Define the defect: assess penile, scrotal and suprapubic involvement separately; identify usable residual skin and the coverage needed after excision.
- Evaluate the donor site: previous groin dissection, radiation, scars, lymphatic impairment, and vascular anatomy may limit a pedicled SCIP option. Protect drainage of the donor leg as well as the genital region.
- Map vessels and lymphatics separately: duplex ultrasound helps locate arterial branches/perforators; ICG lymphography delineates superficial collectors and their direction. A vascular map alone cannot establish that the lymphatic pathway is usable.
- Plan the reach and closure: confirm the skin and deep-fat components, pedicle route, recipient contact, and donor closure without excessive tension. A thin penile skin paddle and a lymphatic-bearing deep-fat component serve different purposes.[2]
The SCIA has variable superficial and deep branches and perforators. Cadaver landmarks are orientation aids, not fixed safe-dissection coordinates for an individual patient.[6][7] A 12-patient ultrasound study reported agreement for perforator number and emergence points in its selected free-flap cases; it did not validate every anatomical measurement or guarantee flap survival. Two total flap losses occurred in that series.[8]
Operative Principles
The following summarizes the authors' SCIP-LIFT version; it is not a universal protocol for all SCIP or lymph-node-transfer operations.[2]
1. Excise disease while protecting genital structures
Resect the involved skin and subcutaneous tissue according to the mapped extent and reconstructive plan. During penile skin resection, preserve Buck's fascia and the underlying dorsal neurovascular structures. Identify and protect the urethra, testes, and spermatic cords, and avoid cord twisting during reconstruction. The authors describe orchidopexy; its use depends on the anatomy and reconstruction. Preserve uninvolved tissue where useful rather than treating “radical” as a requirement to sacrifice healthy structures.[2]
2. Raise the planned lymphatic-bearing flap
Maintain perfusion to the skin and the deep-fat component containing mapped lymphatic collectors. Preserve the inguinal nodes around the pedicle and avoid injuring donor-leg drainage. Additional deep fat can extend the collector-bearing component's reach. Aggressive thinning of this component would conflict with the intended LIFT design; do not substitute a superthin coverage flap and assume the same lymphatic content.[2]
3. Transfer and orient the flap
Bring the pedicled flap through an adequately sized suprapubic tunnel or the planned route without constricting, twisting, or stretching its pedicle. Orient the collector-bearing fat so that distal/lateral lymphatic ends contact the affected deep subcutaneous tissue and drainage is directed toward the preserved groin pathway. Recheck perfusion and freedom from compression after positioning and closure. The published mechanism relies on subsequent lymphatic reconnection, rather than direct lymphatic suturing.[2]
4. Reconstruct scrotal and penile coverage
The original series used a full-thickness SCIP lymphatic flap for the scrotum in all seven patients and an additional pure-skin-perforator flap for penile coverage in three. The later technical description also allows preservation of uninvolved prepuce or selected graft coverage for a residual defect. Choose the reconstruction for pliability, adequate coverage and perfusion; penile disease still requires assessment even when its resurfacing component does not carry the main lymphatic reconstruction.[1][2]
5. Close and monitor
Close the donor site without compromising its tissues or the transferred pedicle. Monitor flap perfusion, wound healing, hematoma/seroma, infection, genital swelling and donor-leg symptoms. A pedicled design avoids a free vascular anastomosis, but still requires expertise in perforator and lymphatic surgery; it is not a low-risk substitute for specialist care.[2][8]
Outcomes and Their Limits
| Report | Population and findings | What it does not establish |
|---|---|---|
| Yamamoto et al., 2022 | Retrospective seven-patient series: four scrotal and three penoscrotal cases. No postoperative genital complication or genital recurrence was reported at mean 22.7 months. GLS improved from 6.7 to 0.3; no postoperative compression was applied | A zero rate for every possible donor/systemic event, lifelong freedom from recurrence, or superiority of the lymphatic component over excision and coverage alone |
| Abdelfattah et al., 2023 | Separate 26-man series: 15 scrotal and 11 penoscrotal cases; mean follow-up 44.9 months. All flaps survived; GLS changed from 6.2 to 0.05, cellulitis decreased, and all 26 reported some quality-of-life improvement (median GBI +41) | An identical operative design to the original 3R, zero complications or recurrence, or a comparative proof of lymphatic restoration |
These are uncontrolled series, with functional improvement after combined excision and reconstruction.[1][4] Do not combine them into a single success percentage, describe a mean follow-up as a minimum for every patient, or treat author use of “curative” as an established treatment effect.
Historical genital-surgery reviews contain heterogeneous case series with different disease severity and techniques. Their pooled complication proportions cannot rank 3R against conventional flaps, grafting, excision, LVA, or VLNT. In particular, the reported 54.2% complication proportion for older flap reconstructions is not a contemporary matched comparator for SCIP-LIFT.[9]
Compression, Complications and Follow-up
No compression in the initial protocol is a study observation. It does not show that compression is uniquely unnecessary after 3R or that it must be lifelong after every alternative. Genital garments can be difficult to fit; individualize postoperative support and longer-term lymphedema treatment to wound/flap status, symptoms, concomitant leg disease and specialist assessment.[1][5]
Discuss wound breakdown, infection, fluid collection, partial or total flap loss, persistent/recurrent edema, donor scarring and possible donor lymphatic injury. Preserving nodes and collectors reduces avoidable injury but cannot justify a promise of zero donor-leg risk. Follow both recipient and donor regions and document urinary and sexual function, cellulitis, symptoms, further procedures and any ongoing compression needs.[2][5][8]
Distinguish Prophylactic Groin Reconstruction
Caretto et al. studied 31 women undergoing bilateral inguinofemoral dissection for vulvar cancer with unilateral lymphatic SCIP reconstruction chosen for the side requiring flap coverage. Mean leg-volume increase was smaller on the reconstructed side (479 versus 683 mL) at mean 30-month follow-up. This was a nonrandomized, side-comparison study with unequal reconstructive indications. It supports further study of lymphatic-preserving groin reconstruction; it does not establish routine prophylactic SCIP transfer during prostate/bladder pelvic lymphadenectomy or prove treatment of male genital elephantiasis.[10]
References
1. Yamamoto T, Daniel BW, Rodriguez JR, et al. Radical reduction and reconstruction for male genital elephantiasis: superficial circumflex iliac artery perforator (SCIP) lymphatic flap transfer after elephantiasis tissue resection. J Plast Reconstr Aesthet Surg. 2022;75(2):870–880. doi:10.1016/j.bjps.2021.08.011
2. Sun JM, Yamamoto T. Genital elephantiasis: surgical treatment and reconstruction. J Chin Med Assoc. 2024;87(2):142–147. doi:10.1097/JCMA.0000000000001021
3. Yoshimatsu H, Cho MJ, Karakawa R, et al. The role of lymphatic system transfer (LYST) for treatment of lymphedema: a long-term outcome study of SCIP flap incorporating the lymph nodes and the afferent lymphatic vessels. J Plast Reconstr Aesthet Surg. 2025;101:15–22. doi:10.1016/j.bjps.2024.11.052
4. Abdelfattah U, Elbanoby T, Hamza F, et al. Treatment of advanced male genital lymphedema with a complete functional lymphatic system pedicled transfer. Urology. 2023;175:190–195. doi:10.1016/j.urology.2023.02.006
5. Executive Committee of the International Society of Lymphology. The diagnosis and treatment of peripheral lymphedema: 2023 consensus document of the International Society of Lymphology. Lymphology. 2023;56(4):133–151. Full consensus
6. Yoshimatsu H, Steinbacher J, Meng S, et al. Superficial circumflex iliac artery perforator flap: an anatomical study of the correlation of the superficial and the deep branches of the artery and evaluation of perfusion from the deep branch to the sartorius muscle and the iliac bone. Plast Reconstr Surg. 2019;143(2):589–602. doi:10.1097/PRS.0000000000005282
7. Gandolfi S, Postel F, Auquit-Auckbur I, et al. Vascularization of the superficial circumflex iliac perforator flap (SCIP flap): an anatomical study. Surg Radiol Anat. 2020;42(4):473–481. doi:10.1007/s00276-019-02402-9
8. Schiltz D, Lenhard J, Klein S, et al. Do-it-yourself preoperative high-resolution ultrasound-guided flap design of the superficial circumflex iliac artery perforator flap (SCIP). J Clin Med. 2021;10(11):2427. doi:10.3390/jcm10112427
9. Guiotto M, Bramhall RJ, Campisi C, Raffoul W, di Summa PG. A systematic review of outcomes after genital lymphedema surgery: microsurgical reconstruction versus excisional procedures. Ann Plast Surg. 2019;83(6):e85–e91. doi:10.1097/SAP.0000000000001875
10. Caretto AA, Stefanizzi G, Fragomeni SM, et al. Lymphatic function of the lower limb after groin dissection for vulvar cancer and reconstruction with lymphatic SCIP flap. Cancers. 2022;14(4):1076. doi:10.3390/cancers14041076