“…The pathophysiology of gynecomastia involves an imbalance in estrogen action relative to androgen action at the level of the breast tissue (Braunstein, 2007;Cuhaci et al, 2014;Johnson & Murad, 2009;Nuttall, 2010). Gynecomastia is usually idiopathic (physiologic) but can be secondary to the effects of certain medications and systemic diseases (Braunstein, 2007;Cuhaci et al, 2014;Deepinder & Braunstein, 2012;He et al, 2019;Johnson & Murad, 2009;Mieritz et al, 2017;Nuttall, 2010;Nuttall et al, 2015;Polat et al, 2019;Sansone et al, 2017). Patients with suspected gynecomastia are usually diagnosed by physical examination (Braunstein, 2007;Cuhaci et al, 2014;Johnson & Murad, 2009;Nuttall, 2010) or, if necessary, may be referred for confirmatory imaging with MG or US (Appelbaum et al, 1999;Chen & Slanetz, 2014;Iuanow et al, 2011;Madhukar & Chetlen, 2013;Tangerud et al, 2016).…”