Recurrent Ependymoma of the Cerebellopontine Angle and Radiation-Induced Pleomorphic Xanthoastrocytoma: A Case Report

Introduction: The majority of posterior fossa ependymomas arise within the ventricular system. Extra-axial, extraventricular ependymomas are rarely encountered in posterior fossa. We report a complex case of a posterior fossa ependymoma with spinal drop metastasis, as well as the first report of radiation-induced pleomorphic xanthoastrocytoma and extra-axial ependymoma of the posterior fossa.