Moyamoya Syndrome Presenting as Stroke in a Toddler with Down Syndrome

Pediatric stroke is a rare but important clinical entity. Lack of experience with childhood stroke, atypical presentations, and a wider differential diagnosis often leads to delayed diagnosis of stroke in children. This case illustrates the association of Moyamoya Syndrome (MMS) with Down Syndrome (DS) in a 2 year old who presented to our emergency department with acute onset hemiparesis.