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Cormac O. Maher, John L. D. Atkinson and John I. Lane

A rteriovenous malformations may involve any part of the CNS, although a location specific to a cranial nerve has never been reported. To our knowledge, this case represents the first report of an angiographically and pathologically proven AVM with a nidus entwined inside the sensory root of the trigeminal nerve. Case Report History This 76-year-old, right-handed man presented with the sudden onset of left convexity headache and gait ataxia. He denied experiencing any facial pain or sensory disturbance in the trigeminal distribution. At the time of

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Microvascular relations of the trigeminal nerve

An anatomical study with clinical correlation

Stephen J. Haines, Peter J. Jannetta and David S. Zorub

C ushing 1 hypothesized that obscure palsies of the cranial nerves might be caused by compression of the nerves by arteries near the brain stem. Dandy 2 found that 30.7% of cases of trigeminal neuralgia in which he exposed the nerve in the posterior fossa had compression and distortion of the trigeminal nerve by the superior cerebellar artery. He hypothesized that this might be an etiological factor in trigeminal neuralgia. This theory has recently been revived by Jannetta, 6 and an operation based upon it has been used in clinical practice. 7, 9 The

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Trigeminal nerve schwannoma with ancient change

Case report and review of the literature

Kene Ugokwe, Narendra Nathoo, Richard Prayson and Gene H. Barnett

trigeminal nerve. Case Report Examination This 23-year-old man presented with a 10-month history of headaches associated with double vision, gait imbalance, and suboccipital neck pain. Physical examination demonstrated a broad-based gait with nystagmus and unilateral mild dysmetria. There was no history of chronic middle ear infections or of travel to any exotic destinations. Magnetic resonance imaging revealed a rim-enhancing cystic lesion in the right cerebellopontine angle and prepontine cistern with displacement of brainstem structures but no hydrocephalus

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Neurosurgical Forum: Letters to the Editor To The Editor Ibrahim M. Ziyal , M.D. Tunçalp Özgen, M.D. Hacettepe University Ankara, Turkey 758 760 Abstract Object. The trigeminal nerve conducts both sensory and motor impulses. Separate superior and inferior motor roots typically emerge from the pons just anterosuperomedial to the entry point of the sensory root, but to date these two motor roots have not been adequately displayed on magnetic resonance (MR) images. The specific aims of this study, therefore, were

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George Krol and Ehud Arbit

P ercutaneous electrocoagulation of the trigeminal nerve was introduced in 1932 by Kirschner. 1 Since that time, the equipment and the technique of placing the electrode have undergone significant improvement, resulting in widespread acceptance of the procedure for treatment of trigeminal neuralgia. The placement of the electrode within the foramen ovale is usually performed under the guidance of fluoroscopy or sequential film radiography. 3 The tip of the electrode is directed through the foramen ovale to the gasserian ganglion located on the floor of the

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Gustavo A. Carvalho, Anette Lindeke, Marcos Tatagiba, Helmut Ostertag and Madjid Samii

, from which partial destruction of the petrous apex and lack of tumor calcification can be noted (right) . Fig. 2. Postcontrast coronal T 1 -weighted magnetic resonance image demonstrating a bright enhancement involving the left cavernous sinus (arrowheads) . Operation A left frontotemporal craniotomy using a transsylvian approach revealed a hard tumor mass that was very adherent to the surrounding structures and invaded the cavernous sinus. The tumor was also very adherent to the carotid artery and trigeminal nerve. A piecemeal tumor

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David G. Hardy and Albert L. Rhoton Jr.

I n 1934, Dandy 1 first suggested that arterial compression and distortion of the trigeminal nerve at its point of entry into the pons might be an etiological factor in trigeminal neuralgia. This distortion of the nerve root was, in Dandy's cases, most commonly caused by a tortuous and elongated superior cerebellar artery (SCA), or one of its branches. More recently, Jannetta 3 has reported a series of patients with trigeminal neuralgia, all of whom had mild to severe distortion and compression of the trigeminal nerve by one or more tortuous arteries

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Kamal Mousa Mira, Ibrahiem Abou Elnaga and Hassanein El-Sherif

T he complex anatomy and function of the trigeminal nerve have still not been fully investigated. It is the purpose of this paper to clarify some anatomical points in an effort to improve our knowledge of the etiological treatment of trigeminal neuralgia. Material and Methods For histological quantitative studies of the trigeminal nerve, fresh postmortem material was collected from young adults very soon after death, and from dogs sacrificed by ether and chloroform. There were 20 human autopsies and 20 dogs used. The three peripheral divisions of the

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Ichiro Nakano, Koichi Iwasaki and Akinori Kondo

I nvolvement of cranial nerves by metastatic tumors is uncommon, and isolated metastasis to a single cranial nerve is especially rare. 3, 5, 8, 14, 15 We report a patient with a trigeminal mononeuropathy caused by a breast cancer metastasis entirely into the trigeminal nerve, mimicking a trigeminal neurinoma. Trigeminal mononeuropathy caused by neoplastic lesions is associated mainly with a trigeminal neurinoma, a cerebellopontine angle meningioma, or an invasive tumor of the neck and nasopharynx. 3, 8, 14 Intracranial metastatic tumors manifesting with

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Fuminari Komatsu, Mika Komatsu, Antonio Di Ieva and Manfred Tschabitscher

T rigeminal schwannoma is rare, but it is the second most common schwannoma after vestibular schwannoma. Schwann cell tumors arise from any section of the trigeminal nerve, and a variety of symptoms and signs may develop as a result. The tumors are usually benign and can be cured by radical resection. 4 , 7 , 17 To date, several microsurgical strategies have been described, and excellent results have been reported. 3 , 4 , 6–8 , 10 , 11 , 17 , 20 , 23–25 However, because trigeminal schwannomas often present with complicated developing patterns, skull