Trauma 1 Trauma Overview 2 Primary Effects of CNS Trauma 3 Secondary Effects and Sequelae of CNS Trauma Nontraumatic Hemorrhage and Vascular Lesions 4 Approach to Nontraumatic Hemorrhage and Vascular Lesions 5 Spontaneous Parenchymal Hemorrhage 6 Subarachnoid Hemorrhage and Aneurysms 7 Vascular Malformations 8 Arterial Anatomy and Strokes 9 Venous Anatomy and Occlusions 10 Vasculopathy Infection, Inflammation, and Demyelinating Diseases 11 Approach to Infection, Inflammation, and Demyelination 12 Congenital Infections, Acquired Pyogenic and Viral Infections 13 Tuberculosis, Fungal, Parasitic, and Other Infections 14 HIV/AIDS 15 Demyelinating and Inflammatory Diseases Neoplasms, Cysts, and Tumor-like Lesions 16 Introduction to Neoplasms, Cysts, and Tumor-like Lesions 17 Astrocytomas 18 Nonastrocytic Glial Neoplasms 19 Neuronal and Mixed Neuronal-Glial Tumors 20 Pineal and Germ Cell Tumors 21 Embryonal and Neuroblastic Tumors 22 Tumors of the Meninges 23 Cranial Nerves and Nerve Sheath Tumors 24 Lymphomas, Hemopoietic and Histiocytic Tumors 25 Sellar Neoplasms and Tumor-like Lesions 26 Miscellaneous Tumors and Tumor-like Conditions 27 Metastases and Paraneoplastic Syndromes 28 Nonneoplastic Cysts Toxic, Metabolic, and Degenerative Disorders 29 Approach to Toxic, Metabolic, and Systemic Diseases 30 Toxic Encephalopathy 31 Inherited Metabolic Disorders 32 Acquired Metabolic Disorders and Systemic Diseases 33 Dementias and Brain Degenerations 34 Hydrocephalus and CSF Disorders Congenital Malformations of the Skull and Brain 35 Embryology and Classification 36 Posterior Fossa Malformations 37 Commissural and Cortical Maldevelopment 38 Holoprosencephalies, Related Disorders, and Mimics 39 Familial Tumor Syndromes 40 Neurocutaneous Syndromes without Associated Tumors 41 Anomalies of the Skull and Meninges