A preschool-age child with first-time seizure and ataxia.

We present a case of a 4-year-old previously healthy child who had a possible first-time seizure at home, and upon a second Emergency Department evaluation was found to have gross cerebellar ataxia suggestive of acute stroke. Initial computed tomography scan and metabolic work-up were unrevealing. Subsequent neuroimaging demonstrated stroke in the left medulla and cerebellum secondary to left vertebral artery dissection. Cervical artery dissection may cause up to 20% of strokes in childhood and adolescence. Unlike typical adult presentations, antecedent or concurrent head and neck pain occurs less often in pediatric dissections. Symptoms of posterior circulation ischemia resulting from vertebral artery dissection may include vertigo, vomiting, ataxia, dysarthria, and seizure. Willingness to utilize newer, non-invasive imaging modalities may lead to earlier recognition of cervical artery dissection when patients have prodromal symptoms or episodes of transient ischemia. Vertebral artery dissection should be included in the differential diagnosis when evaluating children with first time seizure, headache, or neck pain.