Surgical and patient-reported outcomes following double incision and free nipple grafting for female to male gender affirmation: does obesity make a difference?

Background: The efficacy of chest wall contouring in alleviating symptoms of gender dysphoria in transmale and nonbinary patients is well established. As the popularity and indications for these procedures continue to increase, more surgeons are performing these surgeries on obese patients. The aim of this study was to investigate the association of obesity on postoperative and patient-reported outcomes.

Methods: A retrospective chart review was performed for 97 consecutive masculinizing mastectomies by a single surgeon using the double incision and free nipple graft technique (DIFNG). Surgical outcomes were collected using electronic records and patient-reported outcomes using BODY-Q questionnaires.

Results: DIFNG mastectomies were performed in 97 patients from 2016 to 2019, of which 43(44%) were obese and 54(56%) were non-obese. The average follow-up time was 62(12 - 112) months in obese patients and 61(10 - 127) months in non-obese patients. There was no difference in minor and major complication rates between non-obese and obese patients [minor: 4(7%) vs 5(12%), p = 0.19) and major: 0(0%) vs 1(2%), p = 0.46]. BODY-Q data was available for 33(77%) of obese and 43(80%) of non-obese patients. There was no difference in scores for each module of the BODY-Q between obese and non-obese patients (p>0.05).

Conclusion: Chest wall contouring using the DIFNG technique continues to be safe and effective for the management of gender dysphoria in transmale and nonbinary patients. Considering that obese patients have comparable surgical and patient-reported outcomes as non-obese patients, it is our practice to routinely offer the DIFNG technique to healthy obese patients with BMI's between 30 and 40.