The emerging role of magnetic resonance angiography in the management of patients with third cranial nerve palsy.
Am J Ophthalmol
; 128(1): 94-6, 1999 Jul.
Article
em En
| MEDLINE
| ID: mdl-10482100
ABSTRACT
PURPOSE:
To discuss the sensitivity of three-dimensional time-of-flight (3D TOF) magnetic resonance angiography (MRA) for detecting aneurysms causing third cranial nerve palsy and to propose guidelines for the use of MRA in the evaluation of patients with different clinical presentations of oculomotor nerve palsy.METHODS:
From a review of the scientific literature, we determined the proportion of aneurysms of various size that cause third nerve palsy, the sensitivity of MRA in detecting aneurysms of these size classes, and the relationship of aneurysmal size to rupture.RESULTS:
The data disclose that properly performed and interpreted 3D TOF MRA will overlook only 1.5% of aneurysms producing third cranial nerve palsy that will, if untreated, rupture during the subsequent 8 years.CONCLUSIONS:
Magnetic resonance angiography plays an important diagnostic role in the evaluation of patients with isolated third cranial nerve palsy. However, because of the potentially drastic consequences of overlooking an aneurysm, MRA should be the definitive screening test only among patients with a relatively low likelihood of harboring an aneurysm or a relatively high likelihood of suffering a complication from catheter angiography.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doenças do Nervo Oculomotor
/
Aneurisma Intracraniano
/
Angiografia por Ressonância Magnética
Tipo de estudo:
Diagnostic_studies
/
Etiology_studies
/
Guideline
Limite:
Humans
Idioma:
En
Revista:
Am J Ophthalmol
Ano de publicação:
1999
Tipo de documento:
Article
País de afiliação:
Estados Unidos