[Rett's syndrome].

The authors describe Rett's syndrome, its diagnostic criteria--indispensible, supplementary and eliminating symptoms. Historical development and description and prevalence on a world-wide scale. Detailed account of symptoms of different stages, differential diagnosis (in particular of Rett's and Kanner's syndrome). Course of disease and final stage. The aetiology is obscure, the majority of research workers are inclined to accept the assumption of genetic conditioning of Rett's syndrome.