Abstract
Meningiomas are the most common tumors of the central nervous system. Most meningiomas are benign and occur mainly in middle-aged women. Only a few cases of meningiomas in identical twins have been reported. Cyproterone acetate (Androcur® Bayer Healthcare SAS) (CPA) is an antiandrogenic progestin used to treat female hirsutism in some countries including France. We report a case of identical twin sisters who developed multiple, atypically located meningiomas in the setting of long-term CPA use. Eighteen-month follow-up showed spontaneous decrease of meningiomas after cessation of CPA. This case illustrates CPA's ability to induce development of atypically located meningiomas that differ even between identical twins, confirms benefit of surgical abstention, and raises questions regarding security of use of CPA.
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