To the Editor: The Dandy-Walker malformation (DWM) is a congenital malformation characterized by the following triad: hypoplasia of the cerebellar vermis, cystic dilatation of the fourth ventricle, and enlarged posterior fossa. The DWM, the Dandy-Walker variant (DWV) without enlargement of the posterior fossa, and the megacisterna magna are classified as a continuum of developmental anomalies termed as Dandy-Walker complex (DWC).1 Clinical manifestations are dominated by neurological symptoms, developmental delays, and vegetative symptoms. Besides mental retardation, psychiatric symptoms are rarely mentioned in psychiatric literature. A few case reports describe bipolar/affective, psychotic, and attention-deficit disorders in DWM-patients.2 However, whether psychiatric symptoms occur incidentally or are indeed integral to the syndrome, remains unclear. As recent literature supports a prominent role of the cerebellum in the organization of higher-order functions,3 one might speculate about psychiatric symptoms as an integral feature. Here, we present a case of a DWV patient who was formerly diagnosed with comorbid intellectual disability, impulse-control problems, and attention-deficit disorder.