Classification of Transgender Man's Breast for Optimizing Chest Masculinizing Gender-affirming Surgery

Nipple-Preserving Inferior-Ellipse Mastectomy: A New Technique for Gender-Affirming Top Surgery

SUMMARY

The 2 most common techniques for gender-affirming mastectomy are the double-incision free nipple graft and periareolar techniques. However, some patients are not well suited for either technique. When the nipples are high and on the pectoralis muscle, but there is marked breast tissue and skin redundancy, a double-incision free nipple graft would land the incision above the pectoral shadow, but a periareolar approach would not adequately remove the excess skin. In these patients, a nipple-preserving inferior-ellipse incision allows for appropriate chest contouring, leaving the nipple position unchanged and placing the incision in the pectoralis muscle shadow. A retrospective review identified all consecutive patients undergoing nipple-preserving inferior-ellipse mastectomy by the senior author (R.B.-L.). Indications were patients with moderate glandular tissue, skin excess, and a high nipple-areola complex (NAC) above the inferior border of the pectoralis major. Sixteen patients underwent inferior-ellipse mastectomy and were included. Mean follow-up was 203 days. Two patients (14%) required revision of the NAC. There was no partial or complete NAC loss. One patient (7%) developed postoperative seroma, which resolved with aspiration. For patients with moderate glandular tissue, excess skin in the inferior pole, and NAC position above the inferior border of the pectoralis major, the nipple-preserving inferior-ellipse mastectomy technique achieves excellent chest contour.

Gender-affirming surgeries for transgender and gender diverse individuals and associated health outcomes

Gender-affirming care is treatment that recognizes and affirms the gender identity of transgender and gender-diverse (TGD) individuals. Though not all TGD people choose to surgically transition, gender-affirming surgeries (GAS) are an important part of many TGD people's transition. GAS can include a wide array of procedures aimed at aligning an individual's physical characteristics and gender identity. This review describes the most common procedures considered to be GAS, detailing important relevant considerations for each procedure. These include transfeminine procedures (i.e., breast augmentation, penile inversion vaginoplasty, orchiectomy, tracheal shave, and facial feminization); transmasculine procedures (i.e., chest masculinization, hysterectomy, phalloplasty, and metoidioplasty); and other procedures (i.e., fertility preservation and hair removal). Patient outcomes and the legal landscape for GAS are also discussed to contextualize these procedures within largest discourses surrounding gender-affirming care.

Gender affirming surgery in non-binary patients: The importance of patient-centered care

BACKGROUND

Gender-affirming mastectomies are a growing necessity for transgender and gender-diverse patients. The preoperative evaluation and surgical outcome must be tailored to the individual, taking into consideration previous medical history, medications, hormonal therapy, patient anatomy, and expectations. Although non-binary patients constitute a significant portion of patients referring for gender-affirming mastectomies, current literature rarely acknowledges them as a separate patient category from trans-masculine patients.

METHODS

Retrospective cohort, demonstrating the single-surgeon experience with gender-affirming mastectomies over the course of 2 decades.

RESULTS

A total of 208 patients were included in this cohort, patients identifying as "non-binary" in gender accounted for 30.8% of the cohort. Non-binary patients were found to be younger (P value<0.001) at the time of surgery, at the time of HRT initiation (P value<0.001), at the first feeling of gender dysphoria, coming out to society, and use of non-female pronouns (P value = 0.04,<0.001 and<0.001, accordingly). In the non-binary patient group, a shorter period of time passed from the first feeling of gender dysphoria to initiation of HRT and surgery (P value<0.001 and<0.001, accordingly). However, the average time from HRT initiation to surgery and from the first use of non-female pronouns to HRT initiation or surgery did not statistically differ (P value= 0.34, 0.06, and 0.08, accordingly).

CONCLUSION

Non-binary patients demonstrate a significantly different timeline from trans-masculine patients in terms of gender development. In order to accommodate their needs, caregivers must take the information into consideration and develop appropriate guidelines and courses of action.

Defining sexual dimorphism in masculinizing chest surgery using 3-dimensional imaging

There is no consensus on the ideal scar location and inframammary fold (IMF) placement in the gender-affirming double-incision mastectomy technique. Recent advances in imaging technology have facilitated noninvasive investigations into anatomic variability, in many cases, obviating the traditional approach of cadaveric dissection to answer anatomic questions. A better understanding of chest wall sexual dimorphism may allow surgeons who perform gender-affirming procedures to achieve more natural-appearing results. A total of 60 chests were analyzed using either cadaveric dissection (n = 30) or virtual dissection with 3-dimensional (3-D) reconstructions of computed tomography (CT) images (n = 30) using the Vitrea® software. Chest proportions were recorded using each technique, correlating surface anatomy with muscular and bony landmarks. Cadaveric and 3-D radiography chest analysis revealed that natal male chest walls are, on average, wider and longer than natal female chest walls. The pectoralis major muscle dimensions and the location of its insertion were not found to significantly differ between male and female chests. The male nipple-areolar complex (NAC) tended to be narrower in length and width, with a less projecting nipple than the female NAC. Finally, the IMF was found to lie over the interspace between the fifth and sixth rib in both male and female chests. Our findings confirm natal male and female IMF are positioned between the 5th and 6th ribs. This fact affirms the senior author's technique of masculinizing the chest, keeping the masculinized IMF at approximately the same level as the natal female IMF and following the pectoralis major muscle edges to define the resulting scar in a way that differs from previously reported techniques.

Implications of Testosterone Therapy on Wound Healing and Operative Outcomes of Gender-Affirming Chest Masculinization Surgery

The increased awareness of the transgender population and their medical needs has given rise to a wide array of gender-affirming surgeries and hormonal therapies. To better understand the implication of testosterone therapy on female-to-male gender-affirming mastectomies, we conducted a retrospective cohort study based on the medical histories of 170 transgender males operated on by a single surgeon over 18 years. One hundred and one (59.4%) patients received hormonal therapy. The average age of patients in the testosterone treatment group was 20.6 ± 5.3 (range 14-49) years. The median weight of resected breast tissue was 318 g (IQR 221-515) and 311.5 g (IQR 223-480) in patients treated with testosterone, compared to 380 g (IQR 225-735) and 370 g (IQR 240-700) in patients without testosterone treatment (for the right and left breast, respectively). Supplementary liposuction was performed in 35 patients, of whom 23 (64%) were treated with testosterone. Fifty-four patients (31.7%) experienced surgical complications, and 55.6% of complications were recorded in the group treated with testosterone. Forty-nine patients (28.8%) recorded their satisfaction using the Likert satisfaction scale; the average satisfaction was 4.86 ± 0.35 in the non-testosterone group and 4.63 ± 0.69 in the testosterone group. Opposing previous cohorts, we did not find a statistically significant association between testosterone and increased surgical complications in gender-affirming mastectomies. Possible explanations include our practice of avoiding testosterone therapy several weeks before the operation and vigorous hemostasis methods.

Evaluation of Life Improvement in Trans Men After Mastectomy: A Prospective Study Using the TRANS-Q

BACKGROUND

Mastectomy is the most common and sometimes the only surgery performed in FtM transgender individuals. In this study, it was aimed to evaluate the improvement in life standards of patients who underwent double incision mastectomy with free nipple-areolar complex graft and periareolar mastectomy by using TRANS-Q in trans men.

MATERIALS AND METHODS

TRANS-Q was performed in 71 trans men at the preoperative and postoperative 1st year, and the revision and complication rates in both groups were compared.

RESULTS

A statistically significant difference was observed in the postoperative satisfaction rates in both groups. We observed that the patients who underwent periareolar mastectomy had significantly higher satisfaction rates than the patients who underwent double incision mastectomy with free nipple areolar complex graft. In both groups, postoperative satisfaction rates were found to be significantly higher.

CONCLUSION

Improvement in life standards has been observed in trans men who underwent mastectomy, and late results should be evaluated with further prospective studies.

LEVEL OF EVIDENCE IV

This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Hematoma following gender-affirming mastectomy: A systematic review of the evidence

BACKGROUND

Hematomas are reported to be the most common immediate complication in patients undergoing gender-affirming mastectomy, with rates substantially higher than those associated with other types of breast surgery. This study sought to examine the breadth of current literature and provide evidence-based explanations regarding the development of hematomas in chest masculinizing surgery and technical considerations for reducing their incidence.

METHODS

A systematic review was conducted to identify all articles related to gender-affirming mastectomy published through September 2021. Literature search yielded 2,661 articles for screening, of which 20 met inclusion criteria. Themes from the selected articles were compiled to generate consensus statements qualified by associated level of evidence (LOE).

RESULTS

The rate of hematoma following gender-affirming mastectomy is reported in the literature ranging from 0% to 31.2%. The use of more limited, nipple-sparing incisions is associated with a higher hematoma rate than mastectomy with free nipple grafting (Level III). There is no conclusive evidence indicating any relationship between the use of masculinizing hormones and the incidence of hematoma (Level IV). Factors such as body mass index (Level III) and breast size (Level III) were not found to influence hematoma risk, though nicotine use (Level IV) was significantly associated with the incidence of hematoma.

CONCLUSIONS

Hematoma is a known complication following gender-affirming mastectomy. The use of limited incision approaches has the strongest association with an increased risk of hematoma. There is no evidence indicating an association between hormone use (i.e., testosterone) and hematoma incidence. Future studies are needed to better define factors, interventions, and protocols to reduce the rate of hematoma.

LEVEL OF EVIDENCE

III.

Analysis of Nipple-Areola Complex Localization Using Male Cadavers: Considerations for Gender-Affirming Surgery

Background

Masculinizing chest reconstruction is the most common gender-affirming surgery in transgender males. Despite the current literature's acknowledgment of the vital role that proper placement of the nipple-areola complex (NAC) plays in a masculine chest contour, there is still much debate regarding the best anatomical landmarks to achieve the desired result.

Objectives

The primary aim of this study is to determine which landmarks for NAC placement can be applied across diverse body types and aid surgeons in creating a masculine chest.

Methods

Twenty-five formaldehyde-embalmed male cadavers were analyzed by conducting various measurements of the NAC, nipple, and surrounding bony and muscular landmarks to identify the most consistent landmarks for proper NAC placement. Linear regression analyses were run to determine how the distance between nipple to respective landmarks varied based on antemortem body mass index (BMI), height, weight, and age.

Results

The measurements for the inferior and lateral borders of the pectoralis major muscle (PMM) displayed the least amount of variance of all the anatomical landmarks studied. Additionally, there was no significant change in these pectoral measurements with varying BMI, height, weight, or age, indicating that these measurements are reliable landmarks for NAC placement across various body types. The average NAC placement in relation to the inferior and lateral borders of PMM was around 2.5 and 2.0 cm, respectively.

Conclusions

Our cadaveric analysis indicates that aesthetically pleasing masculine chest results can be produced consistently across varying body types when adhering to a simple pectoral approach in NAC placement.