Genetically determined myelinopathies are a large group of neurological diseases that present a challenge to the clinician, the biologist and the geneticist. During the last decade, the development of tools for exploring the nervous system and the human genome has had a tremendous impact on the understanding of these diseases. Thus, the advances in neuroimaging techniques and molecular genetic research are continuously influencing disease classification, diagnostic protocols, and management of patients. These topics are the focus of the present publication. The aim is to provide a comprehensive review of the most important issues regarding genetic myelin disorders.