Prevalence of Contrast Enhancement of the Oculomotor Nerve on 3D PD T1 MRI Sequence in Patients With Ophthalmoplegia

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

134 participants

Study Classification

OBSERVATIONAL

Study Start Date

2017-10-20

Study Completion Date

2021-04-16

Brief Summary

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Oculomotor nerve (third cranial nerve or "III") palsy is a relatively frequent cause of consultation in ophthalmology.

It may reveal a life-threatening pathology such as aneurysm rupture, pituitary apoplexy, and therefore need imaging in emergency. Apart from few extreme emergency situations, MRI of the oculomotor tract is the first-line examination required. In our usual clinical practice, we noticed in several patients unusual contrast enhancement within the oculomotor nerve on T1 sequence with gadolinium injection, observed in various locations along the nerve path (cavernous and/ or intra-orbital segment).

This contrast enhancement, could confirm the nerve impairment This study aims to analyse the efficiency of a new sequence 3D PD T1 which isotropic spatial resolution less than 1mm, not yet described in the literature, to depict this enhancement.

In patients with ophthalmoplegia involving probably the third cranial nerve, disclosing this MRI sign could help (i) to confirm the involvement of the oculomotor nerve and eliminate differential diagnoses such as myasthenia (ii) to orientate the etiological diagnosis (inflammatory or ischemic origin). This new sequence 3D PD T1 sequence focused on the III could thus be systematically included in the usual MRI protocol.

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Detailed Description

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Conditions

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Ophthalmoplegia

Study Design

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Observational Model Type

CASE_ONLY

Study Time Perspective

CROSS_SECTIONAL

Interventions

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3D PD T1 MRI sequence

After MRI has been performed (about 5 minutes of additional time compared to the usual sequences), a double reading of the MRI will be performed by two radiologists (1 experienced and 1 junior).

Intervention Type DEVICE