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ABSTRACT
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PURPOSE The aim of this study was first to extract and analyze the features of theses short fibers bundles, and secondly to analyze their repartition according to the subjects’ laterality METHOD AND MATERIALS Ten right-handed and ten... more
PURPOSE The aim of this study was first to extract and analyze the features of theses short fibers bundles, and secondly to analyze their repartition according to the subjects’ laterality METHOD AND MATERIALS Ten right-handed and ten left-handed healthy subjects were included. The parcellation of the pre- and postcentral gyri was realized using T1 MR Images, and semi automatically generated 3 regions of interest (ROIs) within each gyrus. White matter fibers bundles were extracted using a stream line tractography and a two ROIs approach. MRI tracks were reconstructed between all pairs of ROIs connecting the adjacent pre- and postcentral gyri. Quantitative analysis was performed on the number of fibers connecting each ROI. Statistical analysis studied the repartition of these fibers in the right and left hemispheres in function of the subjects’ laterality RESULTS Short MRI tracks representing short fibers bundles were bilaterally extracted connecting adjacent pre- and postcentral gyri...
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Aplasia cutis congenita (ACC) of the vertex is a rare and potentially severe malformation. We report the case of a newborn boy presenting ACC of the vertex with a skull defect. Surgical closure of the skin was performed 5 days following... more
Aplasia cutis congenita (ACC) of the vertex is a rare and potentially severe malformation. We report the case of a newborn boy presenting ACC of the vertex with a skull defect. Surgical closure of the skin was performed 5 days following birth, which allowed skin healing. The skull spontaneously remodelled perfectly 6 months later. When associated with skull defect, this rare malformation characterized by the absence of skin carries the risk of severe complications such as rupture of the superior sagittal sinus or infections. Based on a review of the literature, we purpose an overview of the medical and surgical management of vertex ACC, which depends on the size of the skin defect and the presence of a skull defect.
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ABSTRACT The announcement of a brain tumour, in particular glioblastoma, is a psychological shock for the patient and their family. A review has been carried out into this subject by a team of nurses sharing their work time between the... more
ABSTRACT The announcement of a brain tumour, in particular glioblastoma, is a psychological shock for the patient and their family. A review has been carried out into this subject by a team of nurses sharing their work time between the neurosurgical department and the disclosure process unit. Copyright © 2014 Elsevier Masson SAS. All rights reserved.
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ABSTRACT Introduction L’évolution technologique en neurochirurgie a permis le développement de système de magnification de plus en plus performant. C’est le cas des microscopes opératoires et de l’endoscopie. L’endoscopie 3D VisionSense®... more
ABSTRACT Introduction L’évolution technologique en neurochirurgie a permis le développement de système de magnification de plus en plus performant. C’est le cas des microscopes opératoires et de l’endoscopie. L’endoscopie 3D VisionSense® est actuellement disponible. Nous avons souhaité montrer l’utilisation de cette nouvelle technologie dans le cas du traitement d’une fistule artério-veineuse de fosse-postérieure. Matériel et méthode Il s’agit d’un patient de 57 ans qui a développé une tétraparésie rapidement progressive sur quelques jours. Les explorations ont permis de diagnostiquer une fistule durale artério-veineuse de fosse postérieure alimentée par une artère méningée postérieure issue de l’artère occipitale. Le traitement endovasculaire n’a pas été retenu et il a été décidé d’un abord chirurgical par une voie retro-sigmoïde avec une exclusion de la fistule assistée par l’endoscopie 3D. Résultats Une fois exposée, la fistule a pu être aisément exclue sous magnification avec l’endoscope 3D. L’intervention s’est déroulée sans incident et les suites opératoires ont été marquées par une amélioration clinique. L’angiographie a confirmé l’exclusion de la fistule durale. Les détails anatomiques sont exposés à l’aide de la vidéo per-opératoire. Conclusion L’endoscopie 3D permet une magnification importante tout en préservant la profondeur de champ pour une excellente visualisation et appréciation des rapports vasculaires et nerveux. Dans le cas d’une fistule durale l’exploration est facilitée en raison de la maniabilité de l’optique, contrairement au microscope.
We report the case of a 36-year-old man who underwent neurosurgery for a T9 spine fracture consecutive to a fall. The patient had complete postoperative blindness which did not totally recover during the hospital stay. Decreased visual... more
We report the case of a 36-year-old man who underwent neurosurgery for a T9 spine fracture consecutive to a fall. The patient had complete postoperative blindness which did not totally recover during the hospital stay. Decreased visual acuity and postoperative vision loss are not uncommon in spine surgery. Such postoperative complications in spine surgery are severe. To avoid them, it is mandatory to identify the contributing factors and set up a preventive strategy.
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In order to contribute some new elements to the discussion on the organization of the vertebral veins inside the transverse canal, we compared two dissection techniques: injection/dissection and injection/corrosion. The aim of this study... more
In order to contribute some new elements to the discussion on the organization of the vertebral veins inside the transverse canal, we compared two dissection techniques: injection/dissection and injection/corrosion. The aim of this study was to compare these two techniques to study the vertebral veins, and also to emphasize the importance of preserving specimens in anatomical museums. Using the injection/dissection technique, latex was injected into ten specimens, then the transverse canal was opened to expose the vertebral veins and their anastomoses. Using the injection/corrosion technique, altufix was injected into eight specimens that were afterwards plunged in sulfuric acid and washed daily until complete corrosion was obtained. Both techniques showed concordant results. The vertebral veins were plexuous, located ventro-laterally to the artery and received constant metamerical branches at each level. The injection/dissection technique conserved the anatomical relationships allowing metamerical analysis of the vertebral veins. The injection/corrosion technique, however, failed to conserve these relationships but provided a precise visualization of smaller anastomosis. By analyzing different aspects of the vertebral veins anatomy in the transverse canal, the two techniques complete each other. This study emphasizes the importance of preserving the anatomical preparations: in addition to the historical and cultural value of these preparations, they contain precious information that furthers our anatomical knowledge.
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Cerebral hemispheres represent both structural and functional asymmetry, which differs among right- and left-handers. The left hemisphere is specialised for language and task execution of the right hand in right-handers. We studied the... more
Cerebral hemispheres represent both structural and functional asymmetry, which differs among right- and left-handers. The left hemisphere is specialised for language and task execution of the right hand in right-handers. We studied the corticospinal tract in right- and left-handers by diffusion tensor imaging and tractography. The present study aimed at revealing a morphological difference resulting from a region of interest (ROI) obtained by functional MRI (fMRI). Twenty-five healthy participants (right-handed: 15, left-handed: 10) were enrolled in our assessment of morphological, functional and diffusion tensor MRI. Assessment of brain fibre reconstruction (tractography) was done using a deterministic algorithm. Fractional anisotropy (FA) and mean diffusivity (MD) were studied on the tractography traces of the reference slices. We observed a significant difference in number of leftward fibres based on laterality. The significant difference in regard to FA and MD was based on the slices obtained at different levels and the laterality index. We found left-hand asymmetry and right-hand asymmetry, respectively, for the MD and FA. Our study showed the presence of hemispheric asymmetry based on laterality index in right- and left-handers. These results are inconsistent with some studies and consistent with others. The reported difference in hemispheric asymmetry could be related to dexterity (manual skill).
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To report a case of bilateral subacute subdural hematoma following implantation of intrathecal drug delivery device. We present here the case of a 41-year-old woman with multiple sclerosis and intractable spasticity who developed a... more
To report a case of bilateral subacute subdural hematoma following implantation of intrathecal drug delivery device. We present here the case of a 41-year-old woman with multiple sclerosis and intractable spasticity who developed a bilateral subacute subdural hematoma after the placement of an intrathecal catheter connected to a programmable pump for baclofen infusion. Surgical drainage of the hematoma resulted in full neurologic recovery. This complication due to intracranial hypotension following lumbar puncture has been previously reported only once in patients with implanted intrathecal drug delivery device. Medical and nursing staff dealing with intrathecal therapy should be aware of this potentially severe complication.
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The authors report on 2 cases of delayed compression of the cervical spinal cord by dense scar tissue forming around epidural electrodes implanted for spinal cord stimulation (SCS). This complication has not been previously reported.... more
The authors report on 2 cases of delayed compression of the cervical spinal cord by dense scar tissue forming around epidural electrodes implanted for spinal cord stimulation (SCS). This complication has not been previously reported. Myelopathy developed in 2 patients 5 and 16 years after the surgical placement of a cervical epidural electrode. Prior to myelopathy, both patients experienced a tolerance phenomenon. Magnetic resonance imaging in both cases showed severe compression of the spinal cord by the electrode. At surgery, thick scar tissue surrounding the electrode and compressing the posterior aspect of the cord was discovered. Both patients experienced a full recovery following the removal of both scar tissue and the electrode. Medical and paramedical staff dealing with SCS should be aware of this severe and delayed complication. In addition, the development of epidural fibrosis can explain the occurrence of tolerance.