Within a range of pervasive developmental disorders, autism, as the central syndrome is often difficult to be marked off out of the variety of developmental disorders in childhood at the beginning of diagnostic procedures. First manifestations in children could match the initial prominent difficulties in language expression, attention deficit disorder mental retardation with psychosis, deafness with behavioral problems, etc Early working diagnosis established by child psychiatrist is of dynamic character and therefore could be considered as wrong by laymen or even some experts. Here we analyze evolution of psychopathological manifestation in children diagnosed within a range of pervasive developmental disorders, as well as the timely evolution of established diagnosis (over the decade).

autism; pervasive developmental disorders; classification