Chapter 11 discusses central nervous system (CNS) tumours, including principles, planning volumes, dose distribution, high- and low-grade glioma, Ependymoma, Medulloblastoma, Germ cell tumours —germinoma and teratoma, Vestibular (acoustic) schwannoma, Pituitary tumours (including craniopharyngioma), Meningioma, and primary spinal cord tumours.