Comprehensive Assessment of Acute Isolated or Prominent Dysarthria in the Emergency Department: A Neuro-Emergency Expert's Experience beyond Stroke.

We investigated the clinical characteristics, neuroimaging findings, and final diagnosis of patients with acute isolated or prominent dysarthria who visited the emergency department (ED) between 1 January 2020 and 31 December 2021. Of 2028 patients aged ≥ 18 years with neurologic symptoms treated by a neuro-emergency expert, 75 with acute isolated or predominant dysarthria within 1 week were enrolled. Patients were categorized as having isolated dysarthria ( = 28, 37.3%) and prominent dysarthria ( = 47, 62.7%). The causes of stroke were acute ischemic stroke (AIS) ( = 37, 49.3%), transient ischemic attack (TIA) ( = 14, 18.7%), intracerebral hemorrhage ( = 1, 1.3%), and non-stroke causes ( = 23, 30.7%). The most common additional symptoms were gait disturbance or imbalance ( = 8, 15.4%) and dizziness ( = 3, 13.0%) in the stroke and non-stroke groups, respectively. The isolated dysarthria group had a higher rate of TIA ( = 7, 38.9%), single and small lesions ( = 10, 83.3%), and small-vessel occlusion in Trial of Org 101072 in acute stroke treatment ( = 8, 66.7%). Acute isolated or prominent dysarthria in the ED mostly presented as clinical symptoms of AIS, but other non-stroke and medical causes were not uncommon. In acute dysarthria with ischemic stroke, multiple territorial and small and single lesions are considered a cause.