Video-oculography in multiple sclerosis: Links between oculomotor disorders and brain magnetic resonance imaging (MRI).

BACKGROUND: Eye movement abnormalities (EMA) are common in multiple sclerosis (MS). However, type and severity according to the MS stage are poorly known, especially in Radiologically Isolated Syndrome (RIS) and in Clinically Isolated Syndrome (CIS). Although MRI has been included in the MS diagnostic criteria, there may be clinical-radiological dissociation. OBJECTIVE: To analyze by video-oculography (VOG) prevalence of EMA in different MS phenotypes and study correlations with brain and cervical cord MRI T2 lesions location. METHODS: 76 participants were prospectively recruited (12 RIS, 10 CIS, 11 relapsing-remitting-MS, 10 secondary progressive-MS, 10 primary progressive MS and 23 gender and age-matched healthy controls). We analyzed fixations, anti-saccades, horizontal and vertical reflex saccades and smooth pursuit. RESULTS: EMA were frequent and of gradual severity from RIS to progressive forms. Internuclear ophthalmoplegia (INO) and centripetal hypermetria were strong arguments for the diagnosis of a demyelinating disorder versus a control population. Some EMA were linked to infratentorial T2 lesion location, but others like INO were not. CONCLUSION: This study confirm that EMA are common in all MS phenotypes, even at the earliest stages. VOG can be useful to detect demyelinating process at preclinical stage by highlighting subclinical EMA even in absence of characteristic lesions visible on MRI.

[Follow up of total hip prothesis: storage phosphor versus screen-film radiography]. / Confrontation du couple écran-film conventionnel et des plaques au phosphore dans le suivi des prothèses de hanches.

PURPOSE: Digital radiography may lead to interpretation difficulties in patients with hip prosthesis, especially when initial evaluation was performed using screen film radiography. The purpose of this study was to evaluate inter-observer and inter-technique reproducibility comparing digital and screen-film radiography. MATERIAL AND METHODS: Twenty-eight patients with unilateral (n=24) or bilateral (n=4) hip prosthesis (total=32 prostheses) underwent screen-film and digital (storage phosphor) radiography. The bone-cement and metal-cement interfaces were evaluated for the presence of a lucent line in 14 different sectors reclassified into 3 regions. This evaluation was performed by two independent readers. Inter-observer and inter-technique reproducibility were calculated using kappa values. RESULTS: The inter-observer reproducibility was negligible, poor or average with Kappa values ranging from 0.07 to 0.47. The degree of agreement between the two methods was poor, average or good for both observers with Kappa values ranging from 0.10 to 0.66. CONCLUSION: Although inter-technique agreement is not high, it is better than inter-observer agreement. Therefore, storage phosphor technique should not be rejected for total hip prosthesis follow-up, even though previous films were screen-film radiographs.