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Penile Disassembly (Penectomy / Tissue Redistribution Step)

Penile disassembly is the orchestrating tissue-redistribution step of feminizing vaginoplasty and vulvoplasty — the systematic dismantling of penile structures while preserving key tissues for neovulvar reconstruction.[1][2][3] It is fundamentally distinct from oncologic penectomy: the corpora cavernosa are completely resected and discarded, while the glans, dorsal neurovascular bundle (NVB), urethra, penile shaft skin, and prepuce are preserved and redistributed across downstream component procedures (clitoroplasty, urethroplasty, labiaplasty, canal lining). The five major steps of feminizing genital surgery are: (1) orchiectomy → (2) penile disassembly → (3) neovaginal-cavity creation → (4) urethral-meatus repositioning → (5) clitorolabioplasty.[3]

This is the dedicated atlas page for the orchestrating step. For downstream procedures, see Clitoroplasty (Preputial-Skin Flap, Dorsal NVB), Feminizing Urethroplasty, Feminizing Labiaplasty, Bilateral Simple Orchiectomy, and Penile Inversion Vaginoplasty.

Surgical Technique​

1. Degloving and penile-skin-tube harvest​

A circumferential incision is made and the penile skin is degloved as a tube preserving full length for use as the neovaginal lining (penile inversion). The skin is separated from the underlying structures while maintaining its blood supply.[2][4] See the Skin Graft Vaginoplasty page for canal-lining augmentation when stretched penile length < 10 cm.

2. Separation of the urethra from the corpora​

The urethra (with surrounding corpus spongiosum) is carefully dissected from the ventral groove between the corpora cavernosa, from glans distally to penoscrotal junction proximally, preserving spongiosal blood supply — "dismembering of the urethra from the corpora" in the Baudet step framework.[5][2]

3. Complete resection of the corpora cavernosa​

Both corpora cavernosa are completely resected, typically transected at the pubic symphysis / crural attachments. This is the safety-critical step. The Karim 1991 Amsterdam revision series demonstrated that incomplete resection of the corpora cavernosa and corpus spongiosum led to difficulties during sexual activities in 13 patients, all of whom improved after repeat surgery with near-total excision — establishing near-total spongiosum + total corpora as the standard.[6] Retained erectile tissue can cause:

  • Painful engorgement and bulging during arousal.
  • Difficulty with sexual activity / dyspareunia.
  • Visible periurethral fullness contributing to misdirected stream.

4. Preservation of the glans on the dorsal NVB​

The glans is not removed — it is dissected off the distal corpora cavernosa while meticulously preserving the dorsal neurovascular bundle (paired dorsal nerves, paired dorsal arteries, deep dorsal vein), then reduced in volume (reduction glansplasty) and fashioned into the neoclitoris — see Clitoroplasty (Preputial-Skin Flap, Dorsal NVB) for the named variants (Ghent / Mañero M-flap / Giraldo corona / Soli mons / Balik butterfly / Brassard urethral-flap / Fang classic).[7]

5. Partial preservation of the corpus spongiosum​

A small cuff of corpus spongiosum surrounding the urethra is preserved to maintain urethral blood supply, but the bulk is resected to prevent unwanted engorgement (Karim imperative).[6]

Anatomic Foundation — Dorsal-Nerve Histomorphometry​

Ferrin 2026 is the foundational quantitative anatomic study for sensory preservation across all downstream feminizing-vaginoplasty procedures:[8]

  • Mean ~3,634 myelinated axons per side in the dorsal nerve of the penis.
  • ~7,076 total bilaterally — the anatomic substrate for preserved erogenous sensation in the neoclitoris.
  • Provides the histologic basis for the 0% total neoclitoral necrosis rate in modern single-stage technique (Mañero 2018 n = 97) when the NVB is meticulously preserved.

Cross-link to the Clitoroplasty page Anatomic Foundation section for the full nerve-density / O'Connell / Sedý anatomic framework.

Tissue-Redistribution Schema​

Penile structureFateResulting anatomyAnchor
Penile shaft skinDegloved and invertedNeovaginal canal liningPIV[1][2]
Corpora cavernosaCompletely resectedDiscardedKarim[6]
Glans penisReduced in volume; preserved on dorsal NVBNeoclitorisRehman / Ghent[7]
Dorsal NVBPreserved in entiretyNeoclitoral sensationFerrin[8]
Urethra (corpus spongiosum)Shortened, repositioned; bulk of spongiosum resectedFemale urethral meatusKarim[6]
Prepuce (if present)Inner preputial skinClitoral hood + labia minoraGhent[9]
Scrotal skinTailored separatelyLabia majoraNYU[1]

Each row links to its dedicated component-procedure atlas page (see top navigation).

Outcomes Attributable to the Disassembly Step​

OutcomeResultAnchor
Neoclitoral sensation (good / excellent)86–98% across seriesGoddard, Sigurjónsson[10][11][12]
Orgasm capability at long-term follow-up86% (Sigurjónsson 37 mo); 48% (Goddard)[11][10]
Neoclitoral necrosis2–20% historical (Rehman 1999: 2/10); 0% in single-stage Mañero 2018 (n = 97)[7]
Goddard long-term neoclitoral-sensitivity preservationFirst follow-up 86.3%; long-term phone follow-up 98%[10]
Residual-erectile-tissue complicationsAll 13 patients improved after near-total spongiosum + total corpora revisionKarim 1991[6]

Urethral complications attributable to the disassembly step (urethral stenosis 18–26%, urinary spraying 6–20%) are detailed on the Feminizing Urethroplasty page, particularly the Blasdel 2024 "surgical complication blind spots" patient-vs-surgeon gap.

Phallus-Preserving Alternative (Ascha 2024)​

For nonbinary or gender-diverse patients who desire a vaginal canal but wish to retain the phallus, phallus-preserving vaginoplasty has been described:[13]

  • The penile-disassembly step is omitted entirely — the penis remains intact.
  • The neovaginal canal is created using alternative tissue sources (peritoneum, intestine) — see Peritoneal Pull-Through Vaginoplasty and Intestinal Vaginoplasty.
  • Indicated for nonbinary individuals seeking canal creation without feminisation of external genitalia.

Prerequisites and Eligibility​

Per the Endocrine Society 2017 Hembree CPG and WPATH SOC v8 (2022), penile-disassembly as part of vaginoplasty requires:[14][15]

  • Persistent, well-documented gender dysphoria.
  • Capacity to make a fully informed decision and consent (fertility-affecting, irreversible).
  • Age of majority (≥ 18 yr in most jurisdictions).
  • Well-controlled medical or mental-health conditions.
  • ≥ 12 mo continuous hormone therapy (unless contraindicated).
  • ≥ 12 mo living in a gender role congruent with gender identity.

WPATH and Endocrine Society explicitly list penectomy alongside orchiectomy and vaginoplasty as fertility-affecting irreversible procedures requiring counselling around fertility preservation.[14][15]

Two-Stage Cautionary Note​

Performing components of penile disassembly across two operations (the historical two-stage PIV approach) carries a distinct sensory penalty: Fakin 2021 single-stage-vs-two-stage comparison found 0% neoclitoral necrosis in single-stage vs 4.8% in two-stage — attributable to dorsal-pedicle compromise when clitoroplasty is performed as a second-stage procedure on previously operated tissue. See the PIV page single-stage-vs-two-stage section for the full comparison.

Evidence Limitations​

  • Karim 1991 remains the seminal series establishing the near-total-spongiosum / total-corpora imperative — only 13 patients but provides the conceptual scaffold for all modern technique.[6]
  • Ferrin 2026 dorsal-nerve histomorphometry is the only quantitative nerve-density anchor in the gender-affirming context.[8]
  • No comparative studies evaluate variations in disassembly technique (timing of NVB elevation, extent of spongiosum resection, glans-reduction approach).
  • Long-term outcomes beyond 5 years for the disassembly step itself are conflated with downstream component-procedure outcomes in most series.
  • Ascha 2024 phallus-preserving vaginoplasty is described in a single technique-and-considerations paper — outcomes data not yet mature.[13]

References​

1. Wylie K, Knudson G, Khan SI, et al. Serving transgender people: clinical care considerations and service delivery models in transgender health. Lancet. 2016;388(10042):401–411. doi:10.1016/S0140-6736(16)00682-6

2. Amend B, Seibold J, Toomey P, Stenzl A, Sievert KD. Surgical reconstruction for male-to-female sex reassignment. Eur Urol. 2013;64(1):141–149. doi:10.1016/j.eururo.2012.12.030

3. Raigosa M, Avvedimento S, Yoon TS, et al. Male-to-female genital reassignment surgery: a retrospective review of surgical technique and complications in 60 patients. J Sex Med. 2015;12(8):1837–1845. doi:10.1111/jsm.12936

4. Saylor L, Bernard S, Vinaja X, Loukas M, Schober J. Anatomy of genital reaffirmation surgery (male-to-female): vaginoplasty using penile skin graft with scrotal flaps. Clin Anat. 2018;31(2):140–144. doi:10.1002/ca.23015

5. Leclère FM, Casoli V, Baudet J, Weigert R. Description of the Baudet surgical technique and introduction of a systematic method for training surgeons to perform male-to-female sex reassignment surgery. Aesthet Plast Surg. 2015;39(6):927–934. doi:10.1007/s00266-015-0552-2

6. Karim RB, Hage JJ, Bouman FG, Dekker JJ. The importance of near total resection of the corpus spongiosum and total resection of the corpora cavernosa in the surgery of male to female transsexuals. Ann Plast Surg. 1991;26(6):554–556; discussion 557. doi:10.1097/00000637-199106000-00010

7. Rehman J, Melman A. Formation of neoclitoris from glans penis by reduction glansplasty with preservation of neurovascular bundle in male-to-female gender surgery: functional and cosmetic outcome. J Urol. 1999;161(1):200–206.

8. Ferrin PC, Uloko M, Burnett L, Hunter DA, Peters BR. Histomorphometry of the human dorsal nerve of the penis: analysis and clinical considerations. J Sex Med. 2026;23(3):qdag039. doi:10.1093/jsxmed/qdag039

9. Opsomer D, Gast KM, Ramaut L, et al. Creation of clitoral hood and labia minora in penile inversion vaginoplasty in circumcised and uncircumcised transwomen. Plast Reconstr Surg. 2018;142(5):729e–733e. doi:10.1097/PRS.0000000000004926

10. Goddard JC, Vickery RM, Qureshi A, et al. Feminizing genitoplasty in adult transsexuals: early and long-term surgical results. BJU Int. 2007;100(3):607–613. doi:10.1111/j.1464-410X.2007.07017.x

11. Sigurjónsson H, Möllermark C, Rinder J, Farnebo F, Lundgren TK. Long-term sensitivity and patient-reported functionality of the neoclitoris after gender reassignment surgery. J Sex Med. 2017;14(2):269–273. doi:10.1016/j.jsxm.2016.12.003

12. Huang TT. Twenty years of experience in managing gender dysphoric patients: I. Surgical management of male transsexuals. Plast Reconstr Surg. 1995;96(4):921–930; discussion 931–934.

13. Ascha M, Rigsby S, Shoham M, et al. Individually customized gender-affirming genital procedures: techniques and considerations. J Sex Med. 2024;21(9):827–834. doi:10.1093/jsxmed/qdae075

14. Hembree WC, Cohen-Kettenis PT, Gooren L, et al. Endocrine treatment of gender-dysphoric/gender-incongruent persons: an Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab. 2017;102(11):3869–3903. doi:10.1210/jc.2017-01658

15. Committee on Gynecologic Practice and Committee on Health Care for Underserved Women. Health care for transgender and gender diverse individuals: ACOG Committee Opinion, Number 823. Obstet Gynecol. 2021;137(3):e75–e88. doi:10.1097/AOG.0000000000004294