Treatment of Gynecomastia by Endoscopic Subcutaneous Mastectomy in Adolescents.

Background: Morbidity of traditional open surgery for the treatment of gynecomastia includes asymmetry, retraction of the nipple, and poor scarring. Other approaches were described to improve the results. Endoscopic subcutaneous mastectomy (ESCM) was reported in adult series, including a few adolescents. This technique was considered as safe with good aesthetic results. The aim of this study was to evaluate the results of ESCM in an adolescent series. Patient and Methods: We treated 19 adolescents with Simon's grade IIB and III gynecomastia between June 2014 and July 2018. They could choose open surgery through the nipple or endoscopic surgery by axillary approach. To perform ESCM, three trocars were placed on the midaxillary line to dissect the gland. The resection was performed leaving 1 cm thickness of gland behind the nipple. The gland was extracted after morcellation through the 10 mm trocar. A drainage tube was placed in the cavity. The patients wore a thoracic belt smoothly compressing the operative areas for 15 days. The result was considered as good when there was no remaining gland, good symmetry, and no nipple retraction or nipple lateral displacement. Results: During the study period, 12 adolescents were treated by ESCM and 7 preferred open surgery. Among the 12 ESCM patients, 7 had bilateral and 5 unilateral gynecomastia. A subcutaneous injection of serum was done in the last 6 patients to facilitate the creation of the work space. A 2- or 3-mm second-degree burn occurred in 4 cases, 2 on the nipple and 2 just above the nipple, with a 2 mm remaining scar above the nipple in 1 case. The postoperative course was uneventful in 11 adolescents. One subcutaneous seroma expanded at 15 days postoperative and resolved after 3 weeks of prolonged compression by thoracic belt. The adolescents had 11 good results and 1 persistent asymmetry; 2 other asymmetries had a spontaneous improvement after 1 or 2 years. Conclusion: ESCM is feasible and safe for the treatment of gynecomastia in adolescents. This technique is challenging but permits to reach good aesthetic results and avoids scars on the anterior wall of the thorax.