title: Trigeminal neuralgia.
abstract: 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. The examination protocol should explore the set of CN V pathways. Neurovascular compression is the main cause of essential neuralgia. 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.
authors.affiliation: Neuroradiology Department, Pitié-Salpêtrière Hospital Group, UPMC, 47-83, boulevard de l'Hôpital, 75013 Paris, France. Electronic address: del.leclercq@gmail.com.
authors.forename: D
authors.initials: D
authors.lastname: Leclercq
authors.forename: J-B
authors.initials: JB
authors.lastname: Thiebaut
authors.forename: F
authors.initials: F
authors.lastname: Héran
mesh_terms: D003390:Cranial Nerve Neoplasms / Q000175:diagnosis* / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D007089:Image Enhancement; D007090:Image Interpretation, Computer-Assisted; D008279:Magnetic Resonance Imaging; D009408:Nerve Compression Syndromes / Q000175:diagnosis / Q000473:pathology; D009434:Neural Pathways / Q000473:pathology; D009460:Neurologic Examination; D012680:Sensitivity and Specificity; D014276:Trigeminal Nerve / Q000473:pathology*; D020433:Trigeminal Nerve Diseases / Q000473:pathology*; D061221:Trigeminal Nerve Injuries / Q000175:diagnosis / Q000473:pathology; D014277:Trigeminal Neuralgia / Q000175:diagnosis* / Q000209:etiology / Q000473:pathology*; D014278:Trigeminal Nuclei / Q000473:pathology
keywords: Cranial nerves; Pain; Trigeminal neuralgia