In this issue of MRI Clinics, guest editors Drs. Reza Forghani and Ashok Srinivasan bring their considerable expertise to the topic of Demyelinating and Inflammatory Lesions of the Brain and Spine. Top experts in the field provide multiple articles on multiple sclerosis, as well as articles on bacterial, fungal, and viral infections of the brain and spine. Contains 10 relevant, practice-oriented topics including demyelinating disease: NMO spectrum disorders and variants; toxic and drug-related white matter diseases of the brain and spine; bacterial and viral infectious diseases of the brain; bacterial and viral infectious diseases of the spine; multiple sclerosis: clinical update and clinically-oriented radiologic reporting; basic science of neuroinflammation and involvement of the inflammatory response in disorders of the nervous system; and more. Provides in-depth clinical reviews on demyelinating and inflammatory lesions of the brain and spine, offering actionable insights for clinical practice. Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field. Authors synthesize and distill the latest research and practice guidelines to create clinically significant, topic-based reviews.