Is Clitoral Release Another Term for Metoidioplasty? A Systematic Review and Meta-Analysis of Metoidioplasty Surgical Technique and Outcomes

[Genital gender affirming surgery in trans men]

OBJECTIVE

Genital surgery for masculinisation in the context of gender incongruence is characterised by the reconstruction of male genitalia using multiple surgical techniques - free flap phalloplasty, pedicled flap phalloplasty or metaoidioplasty - which this article aims to describe.

MATERIAL AND METHODS

A narrative review of the literature on these trans surgeries was carried out.

RESULTS

Each technique has specific advantages and disadvantages, and does not produce the same results in terms of surgical risks, size of the reconstructed phallus, sensitivity, sexual function and urinary function.

CONCLUSION

This surgical decision must therefore be shared with the person concerned, based on a clear understanding of their expectations and objectives. Long-term follow-up is recommended.

Assessment of neophallus length following metoidioplasty

Background

An increasing number of gender diverse individuals are presenting for gender affirming care. An option for genital gender affirming surgery (gGAS) in transmasculine individuals is metoidioplasty, creating a small neophallus from enlarged clitoral tissue following prolonged testosterone exposure. The goal of this study is to understand factors which contribute to greater exposed neophallus length following metoidioplasty.

Methods

We performed a retrospective chart review on patients presenting to a single academic institution who underwent a metoidioplasty. All operations were performed using the Belgrade technique with or without urethral lengthening depending on patient preference.

Results

Twenty-seven patients underwent metoidioplasty from 2017-2022. Sixteen had recorded stretched clitoral length (pre-operatively) and exposed neophallus length (post-operatively). The median length of time on testosterone therapy was 4.6 years. The median stretched clitoral length was 5.8 cm, and exposed neophallus length was 6 cm. There was a strong correlation between pre-operative length and post-operative length (ρ=0.9; P<0.0001). There were no correlations between pre-operative length or exposed neophallus length and BMI (ρ=-0.02, P=0.93; ρ=0.05, P=0.83, respectively). Time on testosterone does not correlate with stretched clitoral length nor exposed neophallus length (ρ=-0.28, P=0.15; ρ=-0.35, P=0.18, respectively).

Conclusions

Patients considering metoidioplasty often wonder how large their neophallus will be. We found that patients can expect exposed neophallus length to be about 0.6 cm longer than their pre-operative stretched clitoral length. No evidence of association of time on testosterone nor BMI with exposed neophallus length was found. This information is crucial for gender diverse patients to make informed decisions about gGAS.

Metoidioplasty in Gender Affirmation: A Review

Metoidioplasty is a variant of the gender affirmation technique neophalloplasty, where a hormonally enlarged clitoris is reconstructed to become a small penis. The goals of metoidioplasty are male appearance of the genitalia, voiding in standing position, and completely preserved erogenous sensation of the neophallus. However, it does not enable penetrative sexual intercourse due to the small dimensions of the neophallus. Basic principles of metoidioplasty were established 50 years ago, and many refinements of the technique have been reported since. The latest improvements are based on the advances in urethroplasty, perioperative care, and new insights into female genital anatomy. The current metoidioplasty technique is a one-stage procedure that includes vaginectomy, straightening and lengthening of the clitoris, urethral reconstruction by combined flaps and grafts, and scrotoplasty with insertion of testicular implants. Good aesthetic, functional, and psychosexual outcomes are achieved with this type of neophalloplasty.

Protocol for a scoping review on transition-related surgery procedures, outcome measures and access to care

INTRODUCTION

Transgender and gender diverse (TGD) individuals often identify with a gender different to the one assigned at birth. Transition is a term used to describe the process TGD individuals take to live as their true gender. Surgery can be a very important aspect of care for members of TGD communities. Transition-related surgery (TRS) refers to many different types of surgeries completed to meet a TGD individual's gender-related goals. While various systematic reviews have attempted to synthesise the existing peer-reviewed literature around aspects of TRS, there are few scoping reviews in this area. Our scoping review aims to address this gap through providing an up-to-date overview of the TRS literature in order to provide an overarching view of the topic.

METHOD AND ANALYSIS

This review will follow the methods outlined by the Joanna Briggs Institute's methodology for scoping reviews and will be reported according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews. A search of nine scientific databases resulted in 20 062 potential articles. After removing duplicates, articles will be screened for inclusion using Covidence. Data extraction and synthesis will be carried out using NVivo and reviewed by team members.

ETHICS AND DISSEMINATION

As this study is a scoping review of the existing literature, no ethics review is required. The findings from this review will be disseminated through multiple pathways including open access publication, submission to conferences, social media and Listservs. The findings of the study will also be readily available to clinicians, organizations, interest groups, and policy-makers.

The role of androgens in clitorophallus development and possible applications to transgender patients

BACKGROUND

The clitorophallus, or glans, is a critical structure in sexual development and plays an important role in how gender is conceptualized across the life span. This can be seen in both the evaluation and treatment of intersex individuals and the use of gender-affirming masculinizing therapies to help those born with a clitoris (small clitorophallus with separate urethra) enlarge or alter the function of that structure.

OBJECTIVES

To review the role of testosterone in clitorophallus development from embryo to adulthood, including how exogenous testosterone is used to stimulate clitorophallus enlargement in masculinizing gender-affirming therapy.

MATERIALS AND METHODS

Relevant English-language literature was identified and evaluated for data regarding clitorophallus development in endosex and intersex individuals and the utilization of hormonal and surgical masculinizing therapies on the clitorophallus. Studies included evaluated the spectrum of terms regarding the clitorophallus (genital tubercle, clitoris, micropenis, penis).

RESULTS

Endogenous testosterone, and its more active metabolite dihydrotestosterone, plays an important role in the development of the genital tubercle into the clitorophallus, primarily during the prenatal and early postnatal periods and then again during puberty. Androgens contribute to not only growth but also the inclusion of a urethra on the ventral aspect. Exogenous testosterone can be used to enlarge the small clitorophallus (clitoris or micropenis) as part of both intersex and gender-affirming care (in transmasculine patients, up to 2 cm of additional growth). Where testosterone is insufficient to provide the degree of masculinization desired, surgical options including phalloplasty and metoidioplasty are available.

DISCUSSION AND CONCLUSION

Endogenous testosterone plays an important role in clitorophallus development, and there are circumstances where exogenous testosterone may be useful for masculinization. Surgical options may also help some patients reach their personal goals. As masculinizing gender-affirming care advances, the options available for clitorophallus modifications will likely continue to expand and improve.

Metoidioplasty: Surgical Options and Outcomes in 813 Cases

INTRODUCTION

Metoidioplasty is a variant of phalloplasty for transmen that includes the creation of the neophallus from a hormonally enlarged clitoris, urethral lengthening and scrotoplasty. The procedure results in male appearance of genitalia, voiding in standing position and preserved sexual arousal, but without possibility for penetrative intercourse. We evaluated outcomes of metoidioplasty at our center, based on latest surgical refinements.

METHODS

During the period of 14 years (from February 2006 to April 2020), 813 transmen with mean age of 24.4 years and mean body mass index of 24.6, underwent one stage metoidioplasty. Hysterectomy was simultaneously performed in 156, and mastectomy in 58 cases. Hysterectomy, mastectomy and metoidioplasty were done as a one-stage procedure in 46 transmen. Patients are divided in 5 groups, depending on the type of urethroplasty. Postoperative questionnaires were used to evaluate cosmetic and functional outcomes, as well as patients' satisfaction.

RESULTS

Follow-up ranged from 16 to 180 months (mean 94 months). Mean surgery time was 170 minutes and mean hospital stay was 3 days. Length of the neophallus ranged from 4.8 cm to 10.2 cm (mean 5.6 cm). Urethroplasty was complication-free in 89.5% of cases, and ranged between 81% to 90.3% in different groups. Urethral fistula and stricture occured in 8.85% and 1.70% of cases, respectively. Other complications included testicular implant rejection in 2%, testicular displacement in 3.20% and vaginal remnant in 9.60% of cases. From 655 patients who answered the questionnaire, 79% were totally satisfied and 20% mainly satisfied with the result of surgery. All patients reported voiding in standing position and good sexual arousal of the neophallus, without possibility for penetrative intercourse due to small size of the neophallus.

CONCLUSION

Metoidioplasty has good cosmetic and functional outcomes, with low complication rate and high level of patients' satisfaction. In transmen who request total phalloplasty after metoidioplasty, all available phalloplasty techniques are feasable.