A study of causes and symptoms in cases of paramedian thalamic infarction.

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  • 視床内側部梗塞の成因と症候に関する検討

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Abstract

We conducted MRI and MR angiography to evaluate the relationship between causes and symptom in cases of paramedian thalamic infarction. All symptomatic cases were similar to those reported previously in which thalamic lesions were identified on either the left or both sides. Of the 14 cases, 9 had permanent neuropsychologic disturbances, and in severe cases, cardiogenic embolism was thought to be the major cause. Hypotension or orthostatic blood pressure fall was often confirmed in cases of mild neuropsychologic disturbances, and in cases of vertical gaze palsy or those withiout any symptoms. In such cases, MRI could detect negligible complications of ischemic lesions in other intracranial regions, and MR angiography frequently revealed hypoplasia of the circle of Willis (P1 hypoplasia). From these findings, it appears that the causes of paramedian thalamic infarction are varied, and accordingly the treatment used should differ.

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