Spontaneus involution of meningioma. Case report and literature review.

Meningiomas are tumors of the cerebral meninges, with slow growth and usually benign, whose treatment is essentially surgery. They have progesterone receptors, and to a lesser extent estrogen, which sometimes causes them to have growth or involution linked to hormonal treatment. Its spontaneous involution is extremely rare. We present the case of a male with a meningioma of the sphenoid planum. He had a history of diabetes mellitus, myasthenia gravis and prostate cancer. He was in treatment with analogs of GnRH (leuprorelin), antiandrogen (bicalutamide), β3 agonists and α1 blockers. 15 months after the hormonal blockade, a reduction of the tumor of approximately 90% of its volume was detected. Previous reports show that treatment with gonadotropin analogues produces growth in some meningiomas. Other reports of spontaneous involution affect diabetic patients and patients in treatment with α1 blockers. Literature focus on meningiomas with spontaneous involution is reviewed.