Clinical Reasoning: A Three-Year-Old Boy With Abnormal Movements During Sleep.

We report a case of a three-year-old boy who presented with abnormal movements which initially occurred only during sleep. Three years later, he went on to develop hyperkinetic movements during the daytime while awake. There was a strong family history of various paroxysmal neurological disorders. In this report, we discuss the clinical approach, differential diagnosis, investigation and treatment options for nocturnal hyperkinetic movements and paroxysmal movement disorders.