同名性半盲のみを呈した外側膝状体出血の1例

Abstract

We report a case of a 55-year-old man who developed acute-onset narrowing of his visual field. He showed right homonymous hemianopsia without any other neurological symptoms and signs. Brain CT and MRI showed localized hemorrhage (about 1.6 ml) in the left lateral geniculate body (LGB). A cerebral angiography showed no vascular anomalies of cerebral vessels, and the left anterior choroidal artery and left lateral posterior choroidal artery could be visualized well. He had hypertension, polycythemia and dyslipidemia and was a habitual smoker and an alcoholic. In the literature, various kinds of visual field defects including hemianopsia, upper quadrant hemianopsia, lower quadrant hemianopsia, and horizontal sectoranopia have been reported in eight cases of LGB hemorrhage. Localized LGB hemorrhage was found in only one case out of 2,763 cerebral hemorrhage patients enrolled in our stroke registry for 11 years from 2005 to 2016. Localized hemorrhage of LGB very rarely occurred.