Obsessive-Compulsive Disorder in Autism Spectrum Disorder Across the Lifespan.

Obsessive-compulsive disorder is a relatively common disorder seen in autism spectrum disorder across the lifespan. Many obsessive-compulsive disorder symptoms can present similarly to the core features of autism spectrum disorder and it is often difficult to differentiate between obsessive-compulsive disorder and stereotypic behaviors or restricted interests in autism spectrum disorder. However, there are differences between the 2 disorders. This article is a review of the current literature with the goal of helping the clinician to diagnose and treat obsessive-compulsive disorder in a patient with autism spectrum disorder.