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Results 401 - 450 of 1533
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Tubbs R Shane - - 2007
The sphenoid ridge (posterior aspect of the lesser wings) is encountered in many intracranial procedures. Increased knowledge of its morphology and relationships is, therefore, of importance to the neurosurgeon and clinician who appreciate imaging of this anatomical region. We have quantitated this part of the sphenoid bone in dry human ...
Minville Vincent - - 2007
BACKGROUND: The authors describe a new lateral approach to the sciatic nerve (SN) block in the popliteal fossa by using magnetic resonance imaging (MRI) and assessed its clinical feasibility. METHODS: The authors reviewed the MRI of the SN of 40 patients to compare a new landmark with the classical one. ...
Schultz Ryan M - - 2007
The medical records and magnetic resonance (MR) images of dogs with an acquired trigeminal nerve disorder were reviewed retrospectively. Trigeminal nerve dysfunction was present in six dogs with histologic confirmation of etiology. A histopathologic diagnosis of neuritis (n=2) or nerve sheath tumor (n=4) was made. Dogs with trigeminal neuritis had ...
Yu Zilong - - 2007
CONCLUSIONS: High resolution CT imaging can provide useful information about the pathological exposure of the mastoid portion of the facial nerve before mastoid surgery and can assess the injury site of the facial nerve after operation. OBJECTIVES: To evaluate the diagnostic value of high resolution CT scanning of pathological exposure ...
Lee Hsin-Hua - - 2007
Schwannoma of the hypoglossal nerve is extremely rare. We report the clinical manifestations of a patient with Schwannoma of the hypoglossal nerve with hemi-atrophy of the tongue and numbness in the lip. Magnetic resonance image study of the brain showed a lobulated mass at the right posterior fossa with an ...
Mathur S - - 2007
A 60-year-old woman developed right-eye vision loss secondary to rhinocerebral mucormycosis. Routine MR imaging sequences including enhanced MR imaging showed normal optic nerves, but a diffusion-weighted sequence and apparent diffusion coefficient maps revealed markedly restricted diffusion in the right optic nerve. This MR imaging abnormality of optic nerve infarction due ...
Finsterer Josef - - 2007
The association of pseudotumor cerebri, visual impairment, hypothyroidism, polycystic ovary syndrome (PCOS), and a hypercoagulable state due to a factor V and a prothrombin mutation has not been reported previously. A 20-year-old obese woman developed menstrual cycle irregularities since age 14 years, initially bitemporal and latter diffuse headache since age ...
Magliulo G - - 2007
AIM: To establish if the computed tomography (CT) and magnetic resonance imaging (MRI) appearances of the vestibule, after the removal of vestibular schwannoma by a modified translabyrinthine approach, correlate with a successful outcome, defined as hearing preservation. MATERIALS AND METHODS: Our study group consisted of 16 patients with vestibular schwannoma. ...
Borges Alexandra - - 2007
Many disease processes manifest either primarily or secondarily by cranial nerve deficits. Neurologists, ENT surgeons, ophthalmologists and maxillo-facial surgeons are often confronted with patients with symptoms and signs of cranial nerve dysfunction. Seeking the cause of this dysfunction is a common indication for imaging. In recent decades we have witnessed ...
Pandey Pramod Kumar - - 2007
We report a patient with bilateral incyclotorsion, asymmetric facial palsy, monocular depression deficiency, and unilateral Type 3 Duane syndrome, along with contralateral anotia and a midline cleft palate. A dysplastic middle ear cavity and unilateral absence of the facial nerve were noted on magnetic resonance imaging scanning. The differential diagnosis ...
Borges Alexandra - - 2007
There have been unprecedented improvements in cross-sectional imaging in the last decades. The emergence of volumetric CT, higher field MR scanners and higher resolution MR sequences is largely responsible for the increasing diagnostic yield of imaging in patients presenting with cranial nerve deficits. The introduction of parallel MR imaging in ...
Biega T J - - 2007
The cases presented are rare examples of congenital nystagmus associated with isolated absence of the optic chiasm. MR imaging in both patients demonstrated unremarkable anterior optic pathways and optic tracts. No additional midline central nervous system abnormalities, migrational anomalies, space-occupying lesions, or destructive processes were noted. These cases demonstrate that ...
Gurschi, Mariana
Neurovascular compression of the trigeminal nerve by an overlying vessel, mostly at the root entry zone is considered to be the major cause of trigeminal neuralgia (TGN). The most prevalently used operation technique in patients with trigeminal neuralgia is the microvascular decompression (MVD). Peter Jannetta was the first neurosurgeon to ...
Tsuchiya Kazuhiro - - 2007
PURPOSE: Diffusion-weighted (DW) magnetic resonance (MR) imaging of the nerve roots and peripheral nerves has been reported. We applied a sequence similar to brain diffusion tensor (DT) tractography to such a technique and assessed its feasibility. METHODS: On a 1.5-T MR system, we acquired DW images in the axial plane ...
Kim J Y - - 2007
AIM: To present magnetic resonance imaging (MRI) findings of non-traumatic peroneal nerve palsy and to evaluate the usefulness of MRI in patients with non-traumatic peroneal nerve palsy. MATERIALS AND METHODS: In a retrospective study, 11 consecutive patients presenting with peroneal nerve palsy were included. MR images of the lower leg ...
Singh Tarvinder - - 2007
Recent advancements in the field of imaging, particularly magnetic resonance imaging, have improved the way peripheral nerve tumors are diagnosed, monitored, and treated both medically and surgically. When combined with the all-important clinical evaluation and electrodiagnostic studies, imaging permits a clinician to accomplish the following: identify the size, shape, location, ...
Komatsubara Sachiko - - 2007
The route of the cochlear nerve can be imaged using computed tomography (CT) or magnetic resonance imaging (MRI). To gain information about the cochlear nerve, we conducted a trial measuring the width of the cochlear nerve canal (CNC) using CT. When we examined images of the route of the cochlear ...
Losowska-Kaniewska D - - 2007
Hydrocephalus is characterized by an imbalance of cerebrospinal fluid (CSF) formation and absorption. It is manifested as a dilatation of the ventricular system. About 55% of all hydrocephalus cases have congenital origin. There are two types of hydrocephalus: communicating and non-communicating with subarachnoid space and the diagnosis depends on the ...
Harbaugh Kimberly - - 2007
Schwannomatosis is the most recently recognized form of neurofibromatosis in which patients harbor multiple non-vestibular nerve schwannomas. The diagnosis is contingent on excluding neurofibromatosis Type 2 (NF2), to which it is related. The authors present a case of schwannomatosis diagnosed fortuitously when a preoperative magnetic resonance (MR) image of a ...
Goadsby P J - - 2007
The trigeminal autonomic cephalalgias (TACs) are a group of primary headache syndromes characterised by intense pain and associated activation of cranial parasympathetic autonomic outflow pathways out of proportion to the pain. The TACs include cluster headache, paroxysmal hemicrania and SUNCT (short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing). ...
Bachmann Talis - - 2007
Research on the perception of facial attractiveness has been dominated by aspects of averageness, symmetry, and secondary sex characteristics of faces. Almost absent is systematic research on the spatial scale (coarseness) of detail sufficient to carry information about facial attractiveness. In the present study, subjects were asked to evaluate the ...
Vaphiades Michael S - - 2007
A 36-year-old man developed acute visual loss, mimicking an optic neuritis in the left eye. Cranial magnetic resonance imaging revealed a sphenoid sinus mucocele with extension into the anterior clinoid process abutting the left optic nerve. Endoscopic marsupialization of the mucocele led to marked improvement of vision. Sphenoid sinus mucocele ...
Yamazaki Hiroshi - - 2007
BACKGROUND: The authors describe a new computerized tomography (CT) myelography technique with coronal and oblique coronal view to demonstrate the status of the cervical nerve rootlets involved in brachial plexus injury. They discuss the value of this technique for diagnosis of nerve root avulsion compared with CT myelography with axial ...
Munakata Akira - - 2007
BACKGROUND: This study was performed to reveal the incidence and the etiology of abducens nerve pareses associated with aneurysmal subarachnoid hemorrhage. METHODS: At the time of admission, CT scan was carried out, and the thickness of the prepontine subarachnoid clot was measured. RESULTS: In total 101 patients met the study ...
Cho Y-S - - 2007
We report the MR imaging findings in a case of intracranial aspergillosis involving the internal auditory canal (IAC) and inner ear in an immunocompetent patient. The presence of rim enhancement of the vestibulocochlear nerve, abnormal signal intensity involving the labyrinth, and adjacent meningeal enhancement might help clinicians to make a ...
Kraft Susan - - 2007
Magnetic resonance imaging (MRI) examinations from 18 dogs with a histologically confirmed peripheral nerve sheath tumor (PNST) of the brachial plexus were assessed retrospectively. Almost half (8/18) had a diffuse thickening of the brachial plexus nerve(s), six of which extended into the vertebral canal. The other 10/18 dogs had a ...
Nowé V - - 2007
OBJECTIVES: The place of MRI in the diagnostic work-up of patients with bilateral perceptive hearing loss, tinnitus and vertigo is under discussion. The purpose of this study is to investigate the role of MRI in patients with otovestibular and cranial nerve complaints of unknown aetiology. METHODOLOGY: After thorough otologic examination, ...
Gonçalves Denise Utsch - - 2007
Melkersson-Rosenthal syndrome (MRS) consists of persistent or recurrent orofacial edema, relapsing facial palsy and fissured tongue. The complete triad of symptoms is uncommon, varying from 8 to 25%. The presentation of only one symptom is more common. The most frequent complaint is facial edema and enlargement of the lips. We ...
Pelaz Esteban Marta - - 2007
We present the case of a 25-year-old man who developed a brachial artery pseudoaneurysm and a subsequent haematoma after a penetrating injury with a window glass. A surgical excision of the pseudoaneurysm (anterior access) and a drainage of the haematoma were performed. After surgery, the patient developed a median nerve ...
Eyigor Sibel - - 2006
Viral invasion of the motoneurons and the subsequent inflammation in the anterior horn cells by the varicella zoster virus results in a weakness in the area of the cutaneous eruption. The exact mechanism of zoster paresis is uncertain. The occurrence of symptoms resembling complex regional pain syndrome (CRPS) is common ...
Bangsgaard Regitze - - 2006
PURPOSE: We present a 4-year-old girl with isolated visual loss related to a bilateral oedematous optic neuropathy of unknown origin, occurring after an episode of viral illness. METHODS: A cerebral MRI was performed, showing bilateral enhancement of the optic nerves and bilateral, diffuse, cerebral white matter lesions. RESULTS: The MRI ...
Tarver-Carr Michelle E - - 2006
A young woman with headaches displayed ophthalmoscopic features suggestive of papilledema. MRI showed no intracranial abnormalities but demonstrated oblique insertion of the optic nerve into the left globe and posterior nasal flattening of the left globe, features consistent with congenitally tilted optic discs. This is the second report to show ...
Wessig Carsten - - 2007
Magnetic resonance imaging (MRI) allows assessment of axonal nerve lesions, but detection of focal demyelination is still difficult. We have recently shown that the novel micellar magnetic resonance (MR) contrast agent gadofluorine M (Gf) accumulates in nerve fibers undergoing Wallerian degeneration. In the present study, we report on the in ...
Kim Soo Ryang - - 2006
We describe a rare case of HCV-related recurrent multiple hepatocellular carcinoma (HCC) metastasizing to the skull base involving multiple cranial nerves in a 50-year-old woman. The patient presented with symptoms of ptosis, fixation of the right eyeball, and left abducens palsy, indicating disturbances of the right oculomotor and trochlear nerves ...
de Bondt Bert-Jan - - 2007
INTRODUCTION: The aim of this study was to determine the prevalence of persistent trigeminal artery (PTA) associated with trigeminal neuralgia (TN). METHODS: From January 1998 to January 2004, 288 MRI scans of patients examined for trigeminal deficits were retrospectively evaluated. MRI was performed at 1.5 T. Scan protocols included cerebral ...
Wu H-C - - 2006
The incidence of dural carotid-cavernous sinus fistula (DCCF) presenting as isolated ocular motor nerve palsies without congestive ocular features is unknown. We reviewed the DCCF patients in our hospital during the last 10 years to elucidate the clinical and neuroradiological features of DCCF with isolated ocular motor nerve palsy. Eleven ...
D'Souza G A - - 2006
A 42-year-old man diagnosed to be HIV positive and on highly active antiretroviral treatment (HAART), presented with double vision and gradual drooping of the left eyelid. He had left 3rd cranial nerve palsy and partial right lower-motor-neuron facial palsy. CT of the PNS revealed soft tissue filling the right maxillary ...
Zhang He - - 2006
Recent advances in the technology of magnetic resonance (MR) imaging (MRI) have made the diagnostic evaluations for peripheral nerve disorders shift from the clinical and physiological examination to the anatomical study. As a sensitive noninvasive tool, MR neurography could directly display high-resolution longitudinal and cross-sectional images of peripheral nerves, including ...
Nuthakki S - - 2007
Epithelioid hemangioendothelioma is a tumor of the soft tissues arising from the vascular endothelium. It is considered an intermediate grade malignancy. A 42-year-old female patient presented with pain and tingling down her right arm and a mass at the right medial upper extremity. MRI revealed an oblong mass along the ...
Feigenbaum Frank - - 2006
The surgical anatomy of giant sacral meningeal diverticula varies greatly depending on whether they develop ventral or dorsal to the thecal sac and spinal nerve roots. The ability to distinguish between the two lesion types preoperatively is therefore advantageous. The authors present a method of distinguishing ventral from dorsal meningeal ...
Taoka Toshiaki - - 2006
PURPOSE: To preoperatively visualize the course of the facial nerve, which is displaced by vestibular schwannoma, using diffusion tensor (DT) tractography, and to evaluate the agreement with surgical findings. MATERIALS AND METHODS: The subjects were eight patients with vestibular schwannoma who had undergone removal surgery. DT MR images were obtained ...
Kernohan M D - - 2006
A patient presented with unilateral, right-sided hearing loss and tinnitus and underwent gadolinium-enhanced magnetic resonance imaging (MRI). A pure tone audiogram showed a right-sided sensorineural hearing loss. The MRI scan was initially negative but when repeated seven years later, following a further deterioration of symptoms, it showed a 2 mm, ...
Medina L Santiago - - 2006
BACKGROUND: Detailed evaluation of a brachial plexus birth injury is important for treatment planning. OBJECTIVE: To determine the diagnostic performance of MRI and MR myelography in infants with a brachial plexus birth injury. MATERIALS AND METHODS: Included in the study were 31 children with perinatal brachial plexus injury who underwent ...
Samii Madjid - - 2006
OBJECT: The aim of this study was to describe the symptomatology, radiological features, and surgical treatment of patients with cavernous angiomas within the internal auditory canal (IAC). METHODS: The authors reviewed the cases of seven patients with cavernous angiomas in the IAC that had been surgically treated in the 22-year ...
Sasaka K K - - 2006
Most of the previously reported lumbosacral nerve root avulsions presented with pseudomeningoceles at the time of delayed initial imaging. We report a case of traumatic lumbosacral nerve root injury associated with an isolated femur fracture and demonstrate the evolution of pseudomeningoceles following nerve root avulsions and edema in the perineural ...
Gurgel Richard K - - 2006
OBJECTIVE: To report a unique presentation of disseminated histoplasmosis. STUDY DESIGN: Case report. SETTING: University hospital, tertiary referral center. PATIENT: Our patient presented with vertigo, tinnitus, and unilateral hearing loss, and was initially found to have a 5-mm enhancing left internal auditory canal mass, as revealed by a magnetic resonance ...
Lewis Aaron M - - 2006
BACKGROUND: Sciatica without evidence of lumbosacral root compression is often attributed to piriformis syndrome. However, specific diagnostic tools have not been available to demonstrate sciatic nerve entrapment by the piriformis muscle. OBJECTIVE: To evaluate the use of magnetic resonance (MR) neurography in identifying abnormalities of the sciatic nerve in patients ...
Yoshikawa Takeharu - - 2006
Brachial plexus injury (BPI) is a severe neurologic injury that causes functional impairment of the affected upper limb. Imaging studies play an essential role in differentiating between preganglionic and postganglionic injuries, a distinction that is crucial for optimal treatment planning. Findings at standard myelography, computed tomographic (CT) myelography, and conventional ...
Chen J S - - 2006
A 44-year-old man developed bilateral blindness following severe periorbital cellulitis and pansinusitis. CT and MR imaging demonstrated bilateral cavernous sinus thrombosis. Diffusion-weighted imaging revealed reduced apparent diffusion coefficient in bilateral optic nerves, suggesting optic nerve ischemia caused by the cavernous sinus thrombophlebitis (CST). Following surgical debridement of pansinusitis, antimicrobial therapy, ...
Yoshioka Naoki - - 2006
PURPOSE: The aim of this study was to assess the feasibility of an original reformation method of cervical myelographic computed tomography (CT) using the Bezier surface technique. MATERIAL AND METHODS: Presurgical myelographic computed tomography (CT) scans using a multidetector row CT scanner were performed in 25 patients with avulsion injury ...
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