Abstract
A 58-years-old woman with hypertension admitted to the hospital because of left leg paresis which occurred the day before. On admission, neurological examinations revealed mild left crural paresis (4/5) and ataxia in the left side. Finger-nose test showed dysmetry and intentional tremor in the left. Cranial nerves were normal. Slight hypesthesia in the left leg was observed. The CT scan showed right parasagittal subcortical hematoma. Right carotid angiogram showed mild atherosclerotic changes. There were no tumor stain nor arteriovenous malformation. Ataxic hemiparesis disappeared about 3 weeks after the admission. Enhanced CT scan showed no abnormal enhancement in the parasagittal region 3 months after the onset. Fisher had reported homolateral ataxia and crural paresis (Ataxic hemiparesis) from pontine lesion. However, it has been known that ataxic hemiparesis also occurred by the small lesion of internal capsule or corona radiata. There were few case reports of ataxic hemiparesis from parasagittal hematoma. In our case, damage of cortico-ponto-cerebellar tract at frontal subcortical region may cause homolateral ataxia.
