Problems of Surgery in and around the Brain Stem and the Third Ventricle. A General Perspective.- Anatomy.- Pathology, Metabolic Disturbances.- Neurology, Neurophysiology.- Neuroradiology.- Surgical Management of Specific Lesions: Vascular Lesions, Trauma.- Surgical Management of Lesions in Specific Locations: Pineal Region, Anterior Third Ventricle.- Suprasellar Lesions Affecting Third Ventricle.- Surgery of Processes Affecting Midbrain and Basal Ganglia.- Posterior Fossa: IV Ventricle, Clivus, Foramen Magnum.- Stereotactic Intervention, Radiotherapy, Chemotherapy.