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Surv Ophthalmol. 2005 Jul-Aug;50(4):406-10.

MRA or CTA, that's the question.

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Department of Ophthalmology, University of Alabama, Birmingham, Alabama, USA.


A 26-year-old woman developed a painful left pupil-involving oculomotor palsy. Magnetic resonance imaging of the brain and orbits with and without fat suppression and gadolinium and magnetic resonance angiography of the head were normal. A computed tomographic angiogram showed a left 7-mm posterior communicating artery aneurysm. The different neuroimaging modalities used to diagnose intracranial aneurysms are discussed.

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