Autism spectrum disorder in Say-Barber-Biesecker-Young-Simpson syndrome

Say-Barber-Biesecker-Young-Simpson syndrome (SBBYSS), also known as Ohdo syndrome SBBYS type, is a rare genetic disorder characterised by dysmorphic facial features and severe intellectual disability, as well as cardiac, dental and hearing abnormalities. There has been little psychiatric or psychological description of children with SBBYSS, although previous reports noted repetitive self-injurious behaviours, sensitivity to light and noise and severe deficits in communication. In this report, a 4-year-old male with SBBYSS is described with a focus on psychiatric and psychological assessment, including formal testing for autism spectrum disorder (ASD). Results of multiple behavioural assessment scales are reported. Testing revealed characteristic ASD features, and the patient met criteria for ASD diagnosis in the context of SBBYSS. His behaviours improved with Applied Behavioural Analysis therapy and communication skills training. This is the first documented case of ASD reported alongside SBBYSS. These results suggest ASD may be a clinical feature of SBBYSS.

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