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Differential Diagnosis of Autism Spectrum Disorder Across the Lifespan 

Differential Diagnosis of Autism Spectrum Disorder Across the Lifespan
Differential Diagnosis of Autism Spectrum Disorder Across the Lifespan

Isobel W. Green

, Christen L. Kidd

, and Robert E. Accordino

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date: 30 June 2022

Symptoms consistent with a diagnosis of autism spectrum disorder (ASD) overlap significantly with a wide range of psychiatric conditions. The diagnosis of ASD is often made difficult by the preponderance of differential diagnoses that should be considered in an individual presenting with the cognitive and behavioral symptoms of ASD. A systematic approach to the differential diagnosis of ASD thus involves a thorough consideration of all candidate diagnoses to yield the most accurate classification. This chapter provides key points of overlap between ASD and its most common differential diagnoses, as well as means of differentiating between each condition and ASD in children and adults.

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