Approximately 15% of all ischemic strokes (IS) occur in young adults and adolescents. To date, only limited prior public health and research efforts have specifically addressed stroke in the young. Early diagnosis remains challenging because of the lack of awareness and the relative infrequency of stroke compared with stroke mimics. Moreover, the causes of IS in the young are heterogeneous and can be relatively uncommon, resulting in uncertainties about diagnostic evaluation and causespecific management. Emerging data have raised public health concerns about the increasing prevalence of traditional vascular risk factors in young individuals, and their potential role in increasing the risk of IS, stroke recurrence, and poststroke mortality. These issues make it important to formulate and enact strategies to increase both awareness and access to resources for young stroke patients, their caregivers and families, and health care professionals. The American Academy of Neurology recently convened an expert panel to develop a consensus document concerning the recognition, evaluation, and management of IS in young adults and adolescents. The report of the consensus panel is presented herein. Approximately 15% of all ischemic strokes (IS) occur in young adults and adolescents. [1][2][3][4][5][6][7][8] Compared with stroke in older adults, stroke in the young has a disproportionately large economic impact by leaving victims disabled before their most productive years. To date, only limited prior public health and research efforts have specifically addressed stroke in the young. Early diagnosis remains challenging because of the lack of awareness and the relative infrequency of stroke compared with stroke mimics. Moreover, the causes of IS in the young are heterogeneous and relatively uncommon, 3,8,9 resulting in uncertainties about diagnostic evaluation and cause-specific management. Emerging data have raised public health concerns about the increasing prevalence of traditional vascular risk factors in young individuals, and their potential role in increasing the risk of IS, stroke recurrence, and poststroke mortality. [5][6][7][8]10,11 These issues make it important to formulate and enact strategies to increase both awareness and access to resources for young stroke patients, their caregivers, and health care professionals. The American Academy of Neurology convened an expert panel to develop a consensus document concerning IS in young adults and adolescents. Given the relative lack of high-level scientific evidence concerning stroke in young individuals, an evidence-based management guideline was considered unfeasible. The report of the consensus panel is presented herein.EPIDEMIOLOGY As young adults approach middle age, stroke prevalence increases 5,7 (table 1). Based on selfreport, 532,000 12 to 852,000 13 persons aged 18 to 44 years in the United States have had a stroke. For comparison, among adults aged 17 to 44 years, the self-reported prevalence of stroke is more than twice that of