Microcystic Meningioma - Unusual Variant of Meningiomas

Meningiomas are common benign tumors accounting for 13% to 18% of intracranial neoplasms. They are generally known to be solid tumors and their classical appearance on the computed tomography(CT) scan and magnetic resonance(MR) image usually lead to a correct diagnosis. Meningiomas have been subdivided into a variety of types, including meningotheliomatous, fibrous, transitional, psammomatous, angiomatous, and others. Microcystic meningioma is a rare variant of meningiomas showing microcyst formation. The incidence of cysts in association with meningiomas is between 4%~7%. In 1956, Masson described similar lesions as humid and myxomatous meningiomas and recently WHO classification of brain tumors included the microcystic meningioma as a subtype of meningiomas. The authors encountered a case of microcystic meningioma. So, we report this case with clinicopathological features. Case Report