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KMID : 1036520230130010000
Clinical Neuro-Ophthalmology
2023 Volume.13 No. 1 p.0 ~ p.0
Convergence-retraction Nystagmus in Focal Infarct in the Thalamic-mesencephalic Junction
Choi Moon-Kyung

Lee Hyung
Kim Hyun-Ah
Abstract
Dorsal midbrain syndrome, also known as Parinaud syndrome, is a triad of signs of vertical gaze palsy, light-near dissociation of the pupils, and convergence-retraction nystagmus. This syndrome is usually produced by pressure on the midbrain tectum. The most common etiology is extrinsic compressive lesions such as pineal gland tumors or untreated hydrocephalus, resulting in dilatation of the aqueduct Sylvia. Intrinsic etiology, such as infarction, is very uncommon. We experienced a case with a focal infarction in the thalamic-mesencephalic junction resulting in convergence-retraction nystagmus and upward gaze palsy without light-near dissociation.
KEYWORD
Convergence-retraction nystagmus, Dorsal midbrain syndrome, Cerebral infarction, Vertical gaze palsy
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