“…32 One study with 388 HS patients demonstrated axillary involvement in 278 patients (72%), perianal involvement in 125 patients (32%), groin involvement in 92 patients (24%), and mammary involvement in 32 patients (8%). 33,34 Similar rates were seen in a study by Barth et al 35 Perineal HS is associated with a much higher rate of recurrence (74% in one study) and more debilitating outcomes than axillary HS. 15,24 Lesions often initially occur in the axillae and anogenital regions, but once the disease advances, new lesions develop in areas of friction, including the submammary region (Fig 1), the nape of the neck, the waistband area, and the inner thighs.…”