The ideal location of the male nipple-areolar complex: A pinpointing algorithm

Background In the treatment of gender dysphoria, appropriate nipple-areola complex (NAC) positioning is essential for achieving a natural appearing male chest after subcutaneous mastectomy. An accurate predictive model ideal personalized position NAC still lacking. The aim this study to determine anthropometry create individualized guidelines in preoperative setting.Materials and methods Cisgender participants were recruited. Multiple measurements manually recorded. Best subset regression using linear models was used select predictors horizontal coordinate (nipple-nipple distance; NN) vertical (sternal notch-nipple SNN) NAC. Internal validation assessed bootstrapping. Furthermore, cohort transgender men who had received mastectomy with replantation nipples according current practice identified. Comparison testing between algorithm standard performed test limitations practice.Results One hundred fifty cis included (median age: 26, IQR: 22-34 years). Four found predict NN (age, weight, circumference (CC), anterior-axillar fold (AUX-AUX)) reads as follows: = 4.11 + 0.035*age 0.041*weight 0.093*CC 0.140*AUX-AUX Two SNN (NN weight), 7.248 0.303*NN 0.072*weight. Both well (Bootstrapped R2: 0.63 (NN), 0.50 (SNN)) outperformed previous predicting position. Ninety-six eligible evaluation showed an average placement error −0.9 cm +2.2 SNN.Conclusion non-standardized approach repositioning results significant nipple placement. We suggest that two can be optimize on masculinized wall. Supplemental data article available online at https://doi.org/10.1080/26895269.2021.1884926.