Parents of children with<unk>  can typically trace differences in their children's development to as early as 30 months of age. Developmental screening during a routine check-up by a general practitioner or pediatrician may identify signs that warrant further investigation. The United States Preventive Services Task Force in 2016 found it was unclear if screening was beneficial or harmful among children in whom there are no concerns. Different screening instruments are used to diagnose AS, including the<unk>  Diagnostic Scale (ASDS); Autism Spectrum Screening Questionnaire (ASSQ); Childhood Autism Spectrum Test (CAST), previously called the Childhood<unk>  Test; Gilliam<unk> 's disorder scale (GADS); Krug<unk> 's Disorder Index (KADI); and the autism-spectrum quotient (AQ), with versions for children, adolescents, and adults. None have been shown to reliably differentiate between AS and other ASDs.
Asperger syndrome
Hyperacusis
Zellweger syndrome
Avoidant personality disorder
Scheie syndrome
High-functioning autism
Rett syndrome
Zellweger spectrum disorders