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External and extreme capsular stroke: clinical, topographical and etiological patterns
1Stroke Unit, Department of Neurology, Faculty of Medicine, Ege University, Izmir, Turkey. emre.kumral@ege.edu.tr
Cerebrovascular Diseases (Basel, Switzerland)
|February 1, 2006
Summary
Acute strokes in the external (EcC) and extreme capsular (ExC) regions primarily cause motor deficits and dysarthria. These rare strokes, often due to small artery disease or embolism, generally have a good prognosis.
Area of Science:
- Neurology
- Neuroimaging
- Stroke Medicine
Background:
- Acute strokes affecting the external (EcC) and extreme capsular (ExC) regions are rare.
- Characterizing these specific stroke types is crucial for understanding their clinical impact.
Purpose of the Study:
- To clinically characterize acute strokes limited to the EcC-ExC region.
- To identify the stroke mechanisms and clinical presentations in a cohort of patients.
Main Methods:
- Retrospective analysis of 9 patients with first-ever acute stroke.
- Diffusion-weighted imaging confirmed lesions confined to the EcC-ExC area.
- Clinical data, including neurological deficits and stroke etiology, were reviewed.
Main Results:
- All patients presented with motor deficits (e.g., faciobrachial, faciobrachiocrural paresis).
- Hypesthesia and transient speech disturbances or dysarthria were observed in some patients.
- Small artery disease and artery-to-artery embolism were the primary identified stroke mechanisms.
Conclusions:
- Strokes restricted to the EcC-ExC region commonly manifest as motor syndromes and dysarthria.
- Prodromal signs like transient speech arrest can occur.
- The main etiologies include microangiopathy and embolism, with a generally favorable prognosis.