PMC545208_01
Photograph of Patient Showing Left-Sided Horner Syndrome
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Neuro-ophthalmological examination was normal except for 1 mm of left upper eyelid ptosis (drooping of the eyelid), miosis (constriction of the pupil), and mild enophthalmos (recession of the eyeball into the orbit) consistent with classic left-sided Horner syndrome (Figure 1).
Magnetic Resonance Imaging/Magnetic Resonance Angiography of the Neck Showing Left Internal Carotid Artery Dissection
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Magnetic resonance imaging/magnetic resonance angiography of the brain with cross-sectional imaging of the neck was obtained, which revealed extracranial left internal carotid artery dissection (Figures 2 and 3).
T2-Weighted Magnetic Resonance Imaging Showing Blood in the Arterial Wall and Narrowing of the Lumen of the Left Internal Carotid Artery. This is also known as the "crescent sign," a hallmark of internal carotid artery dissection.
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Magnetic resonance imaging/magnetic resonance angiography of the brain with cross-sectional imaging of the neck was obtained, which revealed extracranial left internal carotid artery dissection (Figures 2 and 3).