Ischemic stroke patients subtyped as of undetermined cause (SUC) usually outnumber
those with determined cause subtypes. Etiological stroke classifications may lead
to neglect of parallel, noncausative findings. Atherosclerosis progresses over decades
and is associated with high morbidity and mortality in young stroke patients in long-term
follow-up studies. We compared the prevalence of carotid atherosclerosis in all TOAST
subtypes among young patients with acute ischemic stroke.