This is an extensive revision of the critically acclaimed teaching file, formerly titled IMAGING OF CNS DISEASE: A CT AND MR TEACHING FILE. The new title includes more comprehensive coverage of the head, neck, brain and spine, and coverage of the ear, nose and throat. It also highlights a shifting in focus to CT, while maintaining substantial MR correlation. Using a traditional teaching file approach (with over 900 cases and over 1000 images), this volume exhibits excellent case selection, organization, and text execution, including description of examination, radiological and clinical findings, differential diagnosis, pearls, and references.