Background: As autism spectrum disorders (ASD) have largely been neglected in old-age psychiatry, the objective of the present paper is to describe the diagnostic process in elderly patients.
Methods: A systematic review of the literature on ASD in older age was undertaken and illustrated by a case series of three elderly patients first diagnosed with ASD in later life by a tertiary mental health clinic.
Results: The search of the literature only yielded three papers on late-life ASD, while the review of the available diagnostic procedures among adults suggests some relevance for screening instruments (Autism Questionnaire), diagnostic instruments (Module 4, Autism Diagnostic Observation Schedule), and neuropsychological examination to profile impairments.