ICD-11 Criteria for Autism Spectrum Disorder (6A02) Autism spectrum disorder is characterised by persistent deficits in the ability to initiate and to sustain reciprocal social interaction and social communication, and by a range of restricted, repetitive, and inflexible patterns of behaviour, interests or activities that are clearly atypical or excessive for the individual’s age and sociocultural context. The onset of the disorder occurs during the developmental period, typically in early childhood, but symptoms may not become fully manifest until later, when social demands exceed limited capacities. Deficits are sufficiently severe to cause impairment in personal, family, social, educational, occupational or other important areas of functioning and are usually a pervasive feature of the individual’s functioning observable in all settings, although they may vary according to social, educational, or other context. Individuals along the spectrum exhibit a full range of intellectual func

Childhood Disintegrative Disorder: Clinical Features and Diagnostic Criteria Waleed Ahmad Published online by MRCPsych UK: Tuesday, 03 May 2022 Introduction There is a loss of skills in several areas of development and deficits in social, communicative, and behavioural functioning that follow normal development in this condition. Often the condition follows a prodromic period during which children develop obscure symptoms; they become restive, irritable, anxious, and overactive. Impoverishment follows this and then loss of speech and language, accompanied by behavioural disintegration. Sometimes the loss of skills is persistently progressive (especially if there is an underlying progressive neurological condition), but more often, the decline over some months and then a slight improvement. The prognosis is usually abysmal, and it leaves most individuals with severe intellectual disability. There is uncertainty about the extent to which this condition differs from autism. Sometimes, th