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  • Title: Pupil-sparing, painless compression of the oculomotor nerve by expanding basilar artery aneurysm: a case of ocular pseudomyasthenia.
    Author: Ajtai B, Fine EJ, Lincoff N.
    Journal: Arch Neurol; 2004 Sep; 61(9):1448-50. PubMed ID: 15364692.
    Abstract:
    BACKGROUND: Oculomotor nerve paresis may have relatively benign but also life-threatening causes. Distinguishing between these is of great clinical importance. OBJECTIVE: To reveal a potential pitfall of the clinical evaluation of oculomotor nerve paresis. PATIENT: Single case observation. RESULTS: A 56-year-old man had fluctuating diplopia and fatigable ptosis, promptly relieved by intravenous edrophonium, leading to the diagnosis of ocular myasthenia gravis. His pupillary function was intact. A few days after the initial diagnosis, he suffered a subarachnoid hemorrhage secondary to the rupture of a basilar artery aneurysm. His ocular symptoms were related to aneurysmal oculomotor nerve compression. CONCLUSION: Patients with oculomotor nerve dysfunction need more detailed evaluation because the underlying cause cannot be safely determined on a clinical basis.
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