The prevalence of androgen excess among acneic-only patients (excluding patients with hirsutism) is less than among hirsute women. In small studies, between 20 and 40% of patients with treatment-resistant acne and without menstrual disturbance, alopecia, or hirsutism are reported to have androgen excess, principally PCOS (30-33). Alternatively, data regarding the predictive ability of seborrhea for androgen excess is lacking. Large populational studies of acneic or hyperseborrheic patients, particularly those without other evidence of hyperandrogenism (e.g., hirsutism), are then still needed to better define this prevalence.
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