| 제목 |
Visual Field Defect After Intraventricular Hemorrhage |
| 소속 |
The Catholic University of Korea St. Vincent's Hospital , Department of Rehabilitation Medicine1 |
| 저자 |
Asayeon Choi1*, Youngkook Kim1†, Bo Young Hong1, Joon-Sung Kim1 |
Damage to the temporal part of optic radiation known as Meyer’s loop causes a superior quadrantanopia. Meyer’s loop passes around the inferior horn of lateral ventricle before reaching to primary visual cortex. We report a case with visual field defect by degeneration of optic radiation after intraventricular hemorrhage (IVH).
A 40 years old man visited to the emergency department of our institute with complaint of severe headache. Brain CT showed IVH in both lateral ventricles and hemorrhage was dominant in left side one. Bilateral external ventricular drainage was conducted in neurosurgery department and he transferred to our department for rehabilitation 4 weeks after onset. He had a complete blindness of left eye because of Moyamoya disease since he was 20 years old. His mother reported he had a difficulty in prompt perception of objects after IVH. Confrontation visual field exam revealed suspicious visual field defect of right eye. Automated visual perimetry demonstrated a right superior quadrantanopia.
T2-weighted image and diffusion tensor imaging was conducted to evaluate the structure related to visual pathway. T2-weighted image revealed dilated inferior horn of left lateral ventricle compressing optic radiation. On diffusion tensor tractography, left optic radiation demonstrated poor visualization of Meyer’s loop and left inferior longitudinal fasciculus showed degenerated feature with small tract volume. These findings implicated IVH as a cause of superior quadrantanopia.
IVH in lateral ventricle can be a cause of visual field defect and diffusion tensor and tractography was useful for the assessment of retro-geniculate visual pathway. |
|
|
