Intracranial Neoplasms and Paraneoplastic Disorders, EpendymomaAdams & Victors Principles of Neurology, Chp 31, pg 655, Ropper, A.H.,et al, 2014
Epidermoid Tumors Involving the Fourth VentricleNeurosurgery 9:9-13, Rosario,M.,et al, 1981