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Hirsutism is present in up to 25% reproductive aged women and is most often caused by polycystic ovary syndrome. Less than 5% of patients with hirsutism are diagnosed with rare endocrine diseases including ovarian or adrenal androgen-producing tumours, but these tumours may be malignant and need surgery. Terminal hair growth on lip and chin gradually increases after menopause, which complicates distinction from normal physiological variation. Precise testosterone assays have just recently become available in the daily clinic. We present three women diagnosed with testosterone-producing tumours. Gold standard techniques were used to measure testosterone levels. All tumours originated from the ovaries. Based on the present cases and the existing literature, we suggest that androgen-producing tumours should be suspected in patients with rapid progression of hyperandrogen symptoms, particularly when total testosterone levels are above three times the upper reference limit.

Total testosterone levels are often more than three times elevated in patients with androgen-secreting tumours