Cerebral Mass Displacements. Part I: Cisternal Hernia in Intracranial Tumours in the Computer Tomogram.- Materials and Methods.- Results.- Influence of Tumour Location on Alterations of the Cisterns.- 1. Tumours of the Frontal Lobe.- 1.1. Frontal Tumours.- 1.2. Frontobasal Tumours.- 1.3. Frontolateral Tumours.- 1.4. Summary.- 2. Tumours of the Temporal Lobe.- 2.1. Temporal Tumours.- 2.2. Temporobasal Tumours.- 3. Tumours of the Parietal Lobe.- 4. Tumours of the Occipital Lobe.- 5. Tumours of the Basal Ganglia.- 6. Tumours of the Posterior Cranial Fossa.- 6.1. Midline Tumours.- 6.2. Tumours of the Cerebellar Hemispheres.- 6.3. Extracerebral Tumours of the Posterior Cranial Fossa.- 7. Occlusive Hydrocephalus.- Discussion.- References.- Cerebral Mass Displacements. Part II: Clinical Findings in Primary and Secondary Brain Stem Lesions.- Patients and Methods.- Results.- 1. Individual Parameters and Their Combinations.- 2. Progress Investigations.- 3. Summary.- Discussion.- References.- Acute Direct and Indirect Lesions of the Brain Stem CT Findings and Their Clinical Evaluation.- Summary.- Material and Methods.- Results.- 1. Supratentorial Lesions.- 1.1. Acute Supratentorial Lesions.- 1.2. Decerebration Without Herniation.- 1.3. Discussion of Supratentorial Lesions.- 2. Infratentorial Lesions.- 2.1. Acute Infratentorial Lesions.- 2.2. Subacute Infratentorial Lesions.- 2.3. Discussion of Infratentorial Lesions.- 3. Direct Changes in the Brain Stem.- 3.1. Hyperdense Lesion.- 3.1.1. Traumatic Direct and Indirect Brain Stem Haemorrhage.- Discussion of Traumatic Brain Stem Haemorrhages.- 3.1.2. Spontaneous Brain Stem Haemorrhage.- Discussion of Spontaneous Brain Stem Haemorrhages.- 3.2. Hypodense Brain Stem Lesions.- 3.2.1. Brain Stem Infarcts.- Discussion of Brain Stem Infarcts.- 3.2.2. Basilar Artery Occlusion.- Discussion of Basilar Artery Occlusions.- 4. Indirect Secondary Infarcts of the Brain Stem and Other Regions.- Discussion of the Indirect Secondary Infarcts.- Rel³!