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Dandy-Walker malformation, which is a congenital malformation of the cerebellum, is documented in literature to be associated
with psychotic symptoms, obsessive compulsive symptoms, mood symptoms, hyperactivity, and impulsive behavior. The
pathogenesis of psychiatric symptoms in Dandy-Walker malformation is thought to be due to disruption of the corticocerebellar
tracts, resulting in what is known as cerebellar cognitive affective syndrome. We present a case of Dandy-Walker malformation
presenting with psychiatric symptoms. This case highlights the necessity to be aware of psychiatric manifestations of cerebellar
disease as it has an impact on the diagnosis and treatment.