“…Although an erosive scalp dermatitis in AEC can appear at birth or infancy, 29 alopecia starts at puberty in many cases of RHS and EEC. This onset is associated with frequent genitourinary malformations 30 and breast/nipple anomalies (Table I) [31][32][33][34][35][36][37][38][39][40][41][42][43] and might be related to sex hormones. Other speculating factors for the scalp dermatitis or alopecia, or both, are hypoplastic adnexal structures 5,44 or hypoplastic epidermis, 5 folliculitis, 45 infection, 16,27,29,46 high temperatures, 19 and atopy or immunological abnormalities.…”