This book provides cutting-edge information on the epidemiology, etiopathogenesis, clinical manifestations, diagnostic procedures and treatment approaches for the main white matter (WM) disorders of the central nervous system (CNS).  WM lesions are associated with many neurological conditions, and with aging. The diagnostic work-up of neurological diseases characterized by the presence of these lesions has changed dramatically over the past few years. This is mainly due on the one hand to the discovery of specific pathogenetic factors in some of these conditions, and on the order to the optimized use of diagnostic tools. All of this has resulted in new diagnostic algorithms, and in the identification of new neurological conditions.  The book offers neurologists essential guidance in the diagnosis and treatment of the most frequent WM conditions, promoting their correct and cost-saving diagnosis and management.