Visual field defects in lateral geniculate body infarction

We report a patient with MRI-proven isolated infarction in the left lateral geniculate body (LGB) who demonstrated unusual homonymous defects in the lower right visual field. A 72-year-old man with hypertension and diabetes mellius developed incongruous lower right wedge-shaped defects without macular sparing. The pattern of the visual field defects reported in this case was different from that in previous cases of LGB infarction. This probably arose becaause of individual differences in vascular anastomoses between the anterior and the lateral posterior choroidal arteries which suppy the LGB or in anastomoses betewen the perforating arteries within the LGB.