Cyproterone acetate and risk of meningioma: a nationwide cohort study


Cyproterone acetate (CPA) has in preliminary studies been linked to the development of meningiomas. Possibly, CPA may induce or increase meningioma growth due to antiandrogen and proprogestin properties, as two-thirds of meningiomas express progesterone and androgen receptors.1 Among individuals assigned male sex at birth, CPA is used to treat prostate cancer, hypersexuality disorder, and as feminising hormone therapy. In individuals assigned female sex at birth, it is used in the treatment of acne, hirsutism, seborrhoea, hair loss and in a low-dose variant in combination with ethinylestradiol in birth control pills.2

A recent cohort study comparing females exposed to high cumulative doses versus low cumulative doses of CPA, found a 6–20 fold increased risk of meningioma.3 Subsequently, the European Medicines Agency’s (EMA) issued a recommendation to restrict CPA to less than 10 milligrams per day.4

In this nationwide study, we assessed national trends in…

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