Diagnostic and interventional imaging
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Injuries are separated into spinal nerve root avulsions (pre-ganglionic lesions) and more distal rupture (post-ganglionic lesions). The lesions may be associated with different nerve root levels. Spinal MRI is used to diagnose pre-ganglionic lesions, which may be present in the absence of pseudomeningoceles. ⋯ Contrast enhancement in the scalene triangle does not predict the quality of the nerve root (continuous injury with response to peroperative stimulation or division of the root needing grafting). Understanding post-traumatic neuronal injuries to the brachial plexus. Knowing how to look for spinal MRI abnormalities and post-ganglionic abnormalities.
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Two different clinical entities, essential or secondary neuralgia, are associated with different pathologies. The pathways of CN V comprise the cervical spine, the brainstem, the root of the nerve and the three peripheral branches: V1, V2 and V3. The lesions responsible for neuralgia are neoplastic, vascular, inflammatory, malformative or post-traumatic. ⋯ It is investigated by T2-weighted inframillimetric volume. Two conditions are necessary to diagnose a neurovascular compression: localised on the root entry zone [(REZ), 2-6mm from the emergence of the pons] and perpendicularly. In the absence of neurovascular compression, thin slices and a gadolinium injection are necessary.