A Cape Hyrax or Dassie, this one named Pretorius, photo by myself in Hermanus, South Africa, October 2005. ...
Neuroectodermal tumours of neuroglial origin: include astrocytomas, oligodendroglioma, and ependymoma derived from astrocytes, oligodendrocytes and ependymal cells respectively. All infiltrate the adjacent brain tissue, but they do not metastasise.