A case of Dandy-Walker malformation: consideration on the teratogenic period and sleep structures.

An 11-month-old girl suffering from Dandy-Walker malformation (DWM) associated with tetralogy of Fallot (TOF) is presented. There has been no report describing a case of DWM associated with TOF. Our case may raise a new discussion on the teratogenic period of these anomalies. A polysomnogram was obtained, and basic sleep components, such as the proportion of each sleep stage and the numbers of body movements and rapid eye movements, showed no significant differences from those in the controls, despite hydrocephalus, pachygyria of the cerebral cortex and a large low density area in the posterior fossa.