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KMID : 0311120090500060777
Yonsei Medical Journal
2009 Volume.50 No. 6 p.777 ~ p.783
Cheiro-Oral Syndrome: A Clinical Analysis and Review of Literature
Chen Wei Hsi

Abstract
Purpose:After a century, cheiro-oral syndrome (COS) was harangued and emphasized for its localizing value and benign course in recent two decades. However, an expanding body of case series challenged when COS may arise from an involvement of ascending sensory pathways between cortex and pons and terminate into poor outcome occasionally.

Materials and Methods:To analyze the location, underlying etiologies and prognosis in 76 patients presented with COS collected between 1989 and 2007.

Results:Four types of COS were categorized, namely unilateral (71.1%), typically bilateral (14.5%), atypically bilateral (7.9%) and crossed COS (6.5%). The most common site of COS occurrence was at pons (27.6%), following by thalamus (21.1%) and cortex (15.8%). Stroke with small infarctions or hemorrhage was the leading cause. Paroxysmal paresthesia was predicted for cortical involvement and bilateral paresthesia for pontine involvement, whereas crossed paresthesia for medullary involvement. However, the majority of lesions cannot be localized by clinical symptoms alone, and were demonstrated only by neuroimaging. Deterioration was ensued in 12% of patients, whose lesions were large cortical infarction, medullary infarction, and bilateral subdural hemorrhage.

Conclusion:COS arises from varied sites between medulla and cortex, and is usually caused by small stroke lesion. Neurological deterioration occurs in 12% of patients and relates to large vessel occlusion, medullary involvement or cortical stroke. Since the location and deterioration of COS cannot be predicted by clinical symptoms alone, COS should be considered an emergent condition for aggressive investigation until fatal cause is substantially excluded.
KEYWORD
Cheiro-oral syndrome, infarction, hemorrhage, sensory, cortex, pons, thalamus, medulla oblongata, crossed, prognosis
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