Midsagittal section through the brain of a patient with a brain stem tumor. Histologic findings showed the tumor to be an ependymoma. Source: Discussion of Cases, Clinical Neuroanatomy, 28e Citation: Waxman SG. Clinical Neuroanatomy, 28e; 2017 Available at: http://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/1969/waxman28_ch25_f027.png&sec=147038153&BookID=1969&ChapterSecID=147038015&imagename= Accessed: October 30, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved