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KMID : 1036520230130010000
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Clinical Neuro-Ophthalmology
2023 Volume.13 No. 1 p.0 ~ p.0
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Convergence-retraction Nystagmus in Focal Infarct in the Thalamic-mesencephalic Junction
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Choi Moon-Kyung
Lee Hyung
Kim Hyun-Ah
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Abstract
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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.
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KEYWORD
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Convergence-retraction nystagmus, Dorsal midbrain syndrome, Cerebral infarction, Vertical gaze palsy
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