Complete Functional Lymphatic-System Pedicled Transfer (Abdelfattah)
The Complete Functional Lymphatic-System Pedicled Transfer (Abdelfattah et al., Urology 2023) is the largest published series of pedicled SCIP-lymphatic flap reconstruction for advanced male genital lymphedema — 26 patients, mean follow-up 44.9 months, with 100% flap survival, GLS 6.2 → 0.05 (p < 0.001), median GBI +41, and 100% QOL improvement.[1]
For the broader condition see Genital Lymphedema and Giant Penoscrotal Lymphedema. For related SCIP-based atlas pages see 3R / SCIP-LFT (Yamamoto) and CHASCIP (Ciudad); for excisional debulking see Modified Charles Procedure and Debulking Scrotoplasty; for free-flap LN transfer see VLNT; for early-stage microsurgery see LVA; for the conservative anchor see Complex Decongestive Therapy.
Background and Contribution
Yamamoto's 3R technique (2022, n = 7, 22.7-mo follow-up) established proof of concept for SCIP-LFT in male genital elephantiasis. Abdelfattah's 2023 Urology series extends that work with:[1][2]
- The largest cohort to date (26 vs 7).
- The longest follow-up for any SCIP-LFT genital series (44.9 vs 22.7 mo).
- The broadest range of reconstructive applications (partial scrotum, total scrotum, partial penile skin, total penile skin).
- The first publication of the technique in a urology journal, targeting the audience that most commonly encounters genital lymphedema.
- Formal validation using two instruments — the Genital Lymphedema Score (GLS) and the Glasgow Benefit Inventory (GBI).
Abdelfattah also separately reported the first combined pedicled superficial inguinal LN transfer + distal LVA for simultaneous scrotal and lower-extremity lymphedema (Microsurgery 2020) — extending the SCIP-based pedicled approach beyond isolated genital disease.[3]
The "Complete Functional Lymphatic System" Concept
The defining innovation is transferring an integrated lymphatic unit rather than nodes or skin alone:[1][4]
| Component | Function |
|---|---|
| Superficial inguinal lymph nodes | Functional filtering / pumping units |
| Afferent lymphatic vessels | Collecting channels draining interstitial fluid into the nodes |
| Vascularized perinodal adipose tissue | VEGF-C reservoir driving neolymphangiogenesis[5][6] |
| Skin paddle | Thin, pliable groin skin ideal for scrotal / penile coverage |
| Intact vascular pedicle (SCIA / SCIV) | Maintains perfusion of all components without microsurgical anastomosis |
This concept was subsequently formalized as Lymphatic System Transfer (LYST) by Yoshimatsu et al., who showed that transferring nodes with their afferent vessels reduces the neolymphangiogenesis required for physiological function — potentially yielding earlier functional recovery than traditional VLNT.[7][4]
Indications
- Advanced male genital lymphedema — isolated scrotal or combined penoscrotal involvement.[1]
- Isolated scrotal lymphedema — 15/26 patients (58%); partial or total scrotal reconstruction.
- Penoscrotal lymphedema — 11/26 patients (42%); combined scrotal + penile skin reconstruction.
- Failed CDT with irreversible fibroadipose changes.
- Patients in whom functional lymphatic restoration is required alongside soft-tissue coverage.
Preoperative Evaluation
| Tool | Role |
|---|---|
| ICG lymphography | Maps functional groin lymphatics; stages dermal backflow (linear = LVA-eligible; splash / stardust = VLNT / SCIP-LFT territory)[3] |
| Genital Lymphedema Score (GLS) | Validated 0–9 subjective severity score; correlates with ICG genital-dermal-backflow stage[8] |
| Glasgow Benefit Inventory (GBI) | 18-item post-intervention QOL questionnaire (−100 to +100); captures general / social / physical health change[10][1] |
GLS components[8]
| Component | Range | Description |
|---|---|---|
| Genital edema | 0–3 | None / Mild / Moderate / Severe |
| Genital lymphorrhea | 0–3 | None / Occasional / Frequent / Continuous |
| Urinary troubles | 0–3 | None / Mild / Moderate / Severe |
| Total GLS | 0–9 | Higher = worse severity |
Surgical Technique
Single-stage operation with two sequential components.
Step 1 — Excision of lymphedematous fibrotic tissue
- Complete excision of all diseased skin and subcutaneous tissue from the affected scrotum and / or penis.
- Testes, spermatic cords, and urethra preserved.
- Extent tailored to disease distribution: partial scrotum (11), total scrotum (15), partial penile skin (2), total penile skin (9).[1]
Step 2 — Pedicled SCIP-lymphatic flap reconstruction
- A pedicled SCIP-lymphatic flap is raised from the ipsilateral groin on the SCIA / SCIV pedicle.
- The flap deliberately includes superficial inguinal lymph nodes within perinodal fat, afferent lymphatic vessels alongside the SCIA, and a skin paddle sized to the defect.
- The flap is rotated into the genital defect without microsurgical anastomosis.
- For scrotal reconstruction, the SCIP-lymphatic flap is inset to create a neoscrotum, enveloping the testes.
- For penile skin reconstruction, the same SCIP-lymphatic flap is used to resurface the penile shaft — a key distinction from the Yamamoto 3R technique, which uses a separate SCIP pure-skin-perforator flap for the penis.[1][2]
Abdelfattah vs Yamamoto 3R vs Ciudad CHASCIP
| Feature | Abdelfattah (2023) | Yamamoto 3R (2022) | Ciudad CHASCIP (2025) |
|---|---|---|---|
| Cohort | 26 | 7 | 8 |
| Follow-up | 44.9 mo | 22.7 mo | 34 mo |
| SCIP design | Unilateral pedicled SCIP-lymphatic for both scrotum and penis | Unilateral pedicled SCIP-LFT (scrotum) + separate SCIP pure-skin-perforator (penis) | Bilateral pedicled lymphatic SCIP (scrotum) + FTSG (penis) |
| Penile coverage | Same SCIP-lymphatic flap | Separate pure-skin-perforator SCIP | Hypogastric FTSG |
| Number of SCIP flaps | 1 | 1 (+ optional 2nd) | 2 (bilateral) |
| Skin graft used | No | No | Yes (FTSG, penis only) |
| Lymphatic component in penile coverage | Yes | No | No |
| Microsurgery required | No (pedicled) | No (pedicled) | No (pedicled) |
| Postop compression | Not reported | Not required | Not reported |
A defining distinction: Abdelfattah uses the same SCIP-lymphatic flap to cover both scrotum and penis — so the penile skin coverage itself contains lymphatic tissue, potentially providing lymphatic drainage to the penis as well as the scrotum.
Outcomes
| Parameter | Result |
|---|---|
| Patients | 26 (15 isolated scrotal, 11 penoscrotal) |
| Mean age | 39 ± 4.6 y |
| Enrollment | Feb 2018 – Jan 2022 |
| Mean follow-up | 44.9 months (longest in any SCIP-LFT genital series) |
| Reconstruction type | Partial scrotum (11), total scrotum (15), total penile skin (9), partial penile skin (2) |
| Flap survival | 100% |
| Cellulitis reduction | Dramatic (p < 0.001) |
| GLS (pre → post) | 6.2 → 0.05 (p < 0.001) |
| GBI total score | Median +41 |
| QOL improvement | 100% of patients |
| Sexual function | Improved |
The postoperative GLS of 0.05 is essentially zero — the best GLS outcome reported in any genital-lymphedema surgical series. For context:
| Series | GLS pre → post |
|---|---|
| Yamamoto 3R | 6.7 → 0.3[2] |
| Ciudad CHASCIP | 6.6 → 0.6[11] |
| Abdelfattah | 6.2 → 0.05[1] |
Median GBI +41 indicates substantial perceived benefit — comparable to historical data showing genital reduction surgery provides greater perceived benefit than limb reduction (90% would repeat the surgery).[10]
Mechanism of Lymphatic Restoration
- Immediate lymphatic drainage via transferred vessels — unlike traditional VLNT (nodes only, reliant on neolymphangiogenesis), SCIP-LFT transfers intact afferent vessels with their nodes, providing pre-existing channels without waiting for new vessel formation (LYST principle).[4][7]
- Neolymphangiogenesis — transferred nodes and perinodal fat are VEGF-C–rich. Maruccia et al. showed podoplanin-positive lymphatic-vessel density rose from 7.92 ± 1.77 to 11.79 ± 3.38 vessels/mm² at 12 months (p = 0.0008).[5]
- Lymph-node pump function — transferred nodes absorb interstitial fluid via afferent lymphatics and channel it into the venous system via high-endothelial venules; newly formed lymphatic channels lie in close anatomic proximity to HEVs.[6]
- Immune restoration — restoration of T- and B-cell populations and dendritic-cell trafficking, explaining the dramatic cellulitis reduction.[6]
Combined Scrotal + Lower-Extremity Lymphedema (Abdelfattah 2020)
In a separate landmark case, Abdelfattah extended the pedicled SCIP-based approach to combined scrotal + lower-extremity lymphedema — a common scenario after pelvic lymphadenectomy:[3]
- Bilateral pedicled superficial inguinal lymph node (SILN) flaps — right SILN to the scrotal root, left SILN to the proximal left thigh over the femoral triangle.
- Distal LVA — 5 anastomoses at the distal leg and medial knee (in areas where ICG showed linear lymphatics).
Outcomes at 9 months:
- Excess lower-extremity volume 49.6% → 9.4%.
- Marked resolution of scrotal lymphedema.
- Decreased dermal backflow on postoperative MR lymphography.
The case established that pedicled SCIP-based LN transfer can simultaneously address genital and extremity lymphedema when combined with distal LVA — directly relevant to urologic-oncology patients with combined post-pelvic-lymphadenectomy disease.[3]
Advantages
| Advantage | Detail |
|---|---|
| Largest evidence base | 26 patients, 44.9 mo follow-up — most robust SCIP-LFT genital data[1] |
| Near-complete symptom resolution | Postoperative GLS 0.05 — best reported in any genital-LE surgical series[1] |
| Versatile reconstruction | Same SCIP-lymphatic flap covers scrotum and penis (simpler than 3R or CHASCIP)[1] |
| 100% flap survival | Zero losses across 26 patients[1] |
| Pedicled — no microsurgery | Broadens access beyond microsurgical centers[1][4] |
| Dual-purpose flap | Simultaneous lymphatic restoration and soft-tissue coverage — neither excision alone nor traditional VLNT achieves both[1] |
| Urology-journal publication | Brings the technique directly to the audience that most commonly encounters genital LE[1] |
Limitations
- Granular complication data not reported — 100% flap survival and dramatic cellulitis reduction are documented, but wound-dehiscence / seroma rates aren't tabulated, hindering direct comparison with Yamamoto 3R (0% complications) and CHASCIP (25% minor).[1][2][11]
- Postoperative compression requirement not reported — unlike the Yamamoto 3R series, which explicitly documented none was required.[1][2]
- No postoperative lymphoscintigraphy — unlike the Ehrl series, which demonstrated objectively improved scrotal lymphatic transport, Abdelfattah relies on clinical outcomes (GLS, GBI, cellulitis).[1][9]
- Single-center experience — multicenter validation pending.[1]
- No control group — historical recurrence rates of excision-only approaches (10–50%) serve as the only benchmark.[1]
Cross-Series Comparison
| Parameter | Abdelfattah (2023) | Yamamoto 3R (2022) | Ciudad CHASCIP (2025) |
|---|---|---|---|
| n | 26 | 7 | 8 |
| Follow-up | 44.9 mo | 22.7 mo | 34 mo |
| Flap survival | 100% | 100% | No flap loss reported |
| Complications | Not detailed | 0% | 25% (minor) |
| Recurrence | Not reported | 0% | 0% |
| GLS (pre → post) | 6.2 → 0.05 | 6.7 → 0.3 | 6.6 → 0.6 |
| QOL | GBI +41 (100% improved) | Significant | Significant |
| Sexual function | Improved | Improved | 87.5% → 0% dysfunction |
| Cellulitis | Dramatically reduced (p < 0.001) | Not reported | Not reported |
| Postop compression | Not reported | Not required | Not reported |
| Mean resected tissue | Not reported | 1,511 g | 1,772.7 g |
Position Within the Genital-Lymphedema Algorithm
The Abdelfattah technique occupies the same niche as the Yamamoto 3R and Ciudad CHASCIP — advanced male genital lymphedema requiring both excision and lymphatic reconstruction. Choice among the three depends on:[1][2][11][12]
| Scenario | Preferred approach | Rationale |
|---|---|---|
| Isolated scrotal LE (moderate–large) | Abdelfattah or Yamamoto 3R | Single unilateral SCIP-lymphatic flap sufficient |
| Penoscrotal LE (moderate) | Abdelfattah | One SCIP-lymphatic flap covers both scrotum and penis |
| Giant penoscrotal elephantiasis | Yamamoto 3R or Ciudad CHASCIP | 3R uses separate SCIP flaps for scrotum / penis; CHASCIP uses bilateral SCIP + FTSG for maximal coverage |
| Combined scrotal + lower-extremity LE | Abdelfattah combined approach (pedicled SILN + distal LVA) | Addresses both compartments in one operation |
| Bilateral groin involvement / prior groin surgery | Free VLNT from alternative donor (omental, lateral thoracic) | SCIP pedicle may be compromised[13] |
Key Takeaways
- The Abdelfattah series is the largest and longest-followed SCIP-lymphatic flap cohort for male genital lymphedema (26 patients, 44.9 mo).[1]
- GLS 6.2 → 0.05 — near-complete symptom resolution and the best GLS outcome reported in any genital-LE surgical series.[1]
- Transferring a complete functional lymphatic system (nodes + afferent vessels + perinodal fat + skin) provides both immediate drainage and long-term neolymphangiogenesis, distinguishing this from traditional VLNT.[1][4][7]
- 100% flap survival and 100% QOL improvement (GBI +41) across 26 patients.[1]
- Pedicled design eliminates microsurgical anastomosis.[1]
- A single SCIP-lymphatic flap can reconstruct both scrotum and penis — simpler than 3R (two SCIPs) or CHASCIP (bilateral SCIPs + FTSG).[1]
- The Abdelfattah combined approach (pedicled SILN + distal LVA) is the only reported one-stage technique simultaneously addressing scrotal and lower-extremity lymphedema — directly relevant after pelvic lymphadenectomy.[3]
- Publication in Urology makes this the most accessible SCIP-LFT reference for urologists managing genital lymphedema.[1]
References
1. 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
2. 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
3. Abdelfattah U, Elbanoby T, Ayad W, Elshamy M, Allam E. Treatment of secondary scrotal and lower extremity lymphedema using combined pedicled lymph node transfer and lymphaticovenous anastomosis: a case report. Microsurgery. 2020;40(8):901–905. doi:10.1002/micr.30656
4. Xu KY, Finkelstein ER, Wu S, Tadisina K, Mella-Catinchi J. Lymphatic system transfer (LYST) with pedicled SCIP for patients with lymphedema and concomitant chronic venous disease. Plast Reconstr Surg. 2026. doi:10.1097/PRS.0000000000012927
5. Maruccia M, Giudice G, Ciudad P, et al. Lymph node transfer and neolymphangiogenesis: from theory to evidence. Plast Reconstr Surg. 2023;152(5):904e–912e. doi:10.1097/PRS.0000000000010434
6. Aschen SZ, Farias-Eisner G, Cuzzone DA, et al. Lymph node transplantation results in spontaneous lymphatic reconnection and restoration of lymphatic flow. Plast Reconstr Surg. 2014;133(2):301–310. doi:10.1097/01.prs.0000436840.69752.7e
7. 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
8. Yamamoto T, Yamamoto N, Furuya M, Hayashi A, Koshima I. Genital lymphedema score: genital lymphedema severity scoring system based on subjective symptoms. Ann Plast Surg. 2016;77(1):119–121. doi:10.1097/SAP.0000000000000360
9. Ehrl D, Heidekrueger PI, Giunta RE, Wachtel N. Giant penoscrotal lymphedema — what to do? Presentation of a curative treatment algorithm. J Clin Med. 2023;12(24):7586. doi:10.3390/jcm12247586
10. Ogunbiyi SO, Modarai B, Smith A, Burnand KG. Quality of life after surgical reduction for severe primary lymphoedema of the limbs and genitalia. Br J Surg. 2009;96(11):1274–1279. doi:10.1002/bjs.6716
11. Ciudad P, Escandón JM, Escandón L, Mayer HF, Manrique OJ. Surgical management of genital lymphedema using the combined Charles' procedure and lymphatic superficial circumflex iliac artery perforator flap transfer (CHASCIP). Microsurgery. 2025;45(5):e70075. doi:10.1002/micr.70075
12. Lu Q, Jiang Z, Zhao Z, et al. Assessment of the lymphatic system of the genitalia using magnetic resonance lymphography before and after treatment of male genital lymphedema. Medicine (Baltimore). 2016;95(21):e3755. doi:10.1097/MD.0000000000003755
13. Schaverien MV, Coroneos CJ. Surgical treatment of lymphedema. Plast Reconstr Surg. 2019;144(3):738–758. doi:10.1097/PRS.0000000000005993