Search Results
Results 301 - 350 of 1549
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Sasagawa Yasuo - - 2008
An 8-year-old boy presented with a rare case of optic nerve apoplexy caused by an arteriovenous malformation (AVM) manifesting as severe headache and blurred vision. Computed tomography (CT) showed a hyperdense suprasellar mass. Magnetic resonance (MR) imaging indicated a hematoma in the right optic nerve. MR angiography showed normal vessels. ...
Amrami Kimberly K - - 2008
MRI has become the modality of choice for imaging the peripheral nervous system. When technically optimized and customized for individual clinical problems, MRI can provide insight into the underlying causes of neoplastic, inflammatory, and other diseases affecting peripheral nerves with a high degree of accuracy and effectively distinguish benign from ...
Bianchi Stefano - - 2008
Peripheral nerves disorders are common in the rheumatologic practice and can mimic a variety of musculoskeletal diseases. Clinical evaluation remains the mainstay for diagnosing nerve disorders of the extremities. A careful history and an accurate physical examination lead in most patients to a high diagnostic suspicion. Nevertheless several imaging techniques ...
Koscielniak-Nielsen Zbigniew J - - 2008
BACKGROUND AND OBJECTIVES: Ultrasound allows visualization of in plane needle insertion toward a nerve and the perineural spread of local anesthetic (LA) solution. However, advancement and final positioning of perineural catheters is difficult to visualize. We assessed the feasibility of long axis nerve scans for controlling perineural catheter placement. METHODS: ...
Sorenson Eric J - - 2008
A peripheral nerve or spinal cord injury is a rare but significant complication of regional anesthesia. Evaluation of acute nerve injury includes a focused history and examination to localize the lesion. Confirmatory testing should include electromyography and appropriate imaging. In most cases magnetic resonance imaging (MRI) is preferred to computed ...
Pollock Jeffrey M - - 2008
A 55-year-old African-American man developed progressive unilateral optic neuropathy and periocular pain. MRI showed thickening and enhancement of the mid-orbital segment of the ipsilateral optic nerve. Optic neuritis was diagnosed, and he was treated with corticosteroids without improvement. After being lost to follow-up, he returned with worsening vision in the ...
Warren Frank M - - 2008
OBJECTIVE: To describe characteristic features of metastatic lesion to the cerebellopontine angle (CPA) and internal auditory canal (IAC). STUDY DESIGN: Retrospective review. SETTING: Tertiary care medical center. PATIENTS: Patients with metastatic lesions to the CPA. INTERVENTION: Diagnostic. MAIN OUTCOME MEASUREMENTS: Clinical presentation and imaging characteristics on magnetic resonance imaging and ...
Aregawi Dawit G - - 2008
We describe a patient in remission from acute lymphoblastic leukemia who developed a painless common peroneal neuropathy. Magnetic resonance imaging (MRI) revealed nerve thickening and enhancement, while a positron emission tomography (PET) scan demonstrated increased fluorodeoxyglucose uptake in a large segment of the neurovascular bundle, suggesting peripheral nerve infiltration. Both ...
Prasai Amit - - 2008
Schwannoma of the facial nerve is an extremely rare condition with an incidence far lower than that of vestibular schwannoma. We discuss the case of a woman who had been diagnosed as having vestibular schwannoma and referred to our hospital. Initially, we concurred with the diagnosis, but on reassessment of ...
Barnett K C - - 2008
OBJECTIVE: The case histories described each presented with a visual deficit, varying from permanent total blindness with ophthalmoscopic evidence of optic atrophy to variable and transient visual disturbances, including occasional blindness, but with absence of ophthalmoscopic or any other ocular abnormality. ANIMALS STUDIED: Three horses of widely different age and ...
I Hoseok - - 2008
We report a case of a symptomatic angioleiomyoma in the left posterior mediastinum. A 66-year-old woman presented with left back and flank pain for 6 months. Chest computed tomography (CT) and magnetic resonance imaging (MRI) revealed a well-circumscribed 4.3 cm round mass. The mass was initially diagnosed as nerve sheath ...
Baggenstos Martin - - 2008
Hemangioblastomas are frequently associated with peritumoral edema caused by extravasation of plasma ultrafiltrate through permeable neoplastic vessels. The authors report the clinical and imaging findings in a 62-year-old man with von Hippel-Lindau disease who presented with rapid (within 24 hours) loss of color vision and nearcomplete loss of left eye ...
Nardone Raffaele - - 2008
We report a patient who presented with the clinical features of obturator mononeuropathy. Abdomino-pelvic computed tomography revealed a fusiform mass in the right perivesical space; magnetic resonance imaging (MRI) showed characteristic "coaxial-cable-like" appearance in cross-section and "spaghetti-like" appearance in longitudinal section, pathognomonic of lipomatosis of the nerve. Nerve lipomatosis as ...
Gultekin S - - 2008
BACKGROUND AND PURPOSE: Tinnitus is a common disorder, and the etiology remains mostly unclear. The purpose of this study was to investigate the causative effect of the vascular loop and compression of the vestibulocochlear nerve at the cerebellopontine angle in patients with unexplained tinnitus. MATERIALS AND METHODS: This study was ...
Spinner Robert J - - 2008
OBJECTIVE: The aim of this study is to exploit the normal nature of peroneal nerve anatomy to identify constant magnetic resonance imaging (MRI) patterns in peroneal intraneural ganglia. DESIGN: This study is designed as a retrospective clinical study. MATERIALS AND METHODS: MR images of 25 patients with peroneal intraneural ganglia ...
Pereira Luciano Sousa - - 2008
Gliomas are the most common infiltrative neoplasms of the optic nerve and can present as two distinct growth patterns: intraneural glial proliferation and perineural arachnoidal gliomatosis (PAG). It has been suggested that perineural arachnoidal gliomatosis is seen almost exclusively in the setting of neurofibromatosis type 1 (NF1). We describe a ...
Rodríguez Jaime - - 2008
BACKGROUND AND OBJECTIVES: Imaging studies in humans have shown that intraneural injection of local anesthetic may be relatively frequent. The incidence of intraneural catheterization is unknown. We speculated that early neural blockade after the injection of a small dose of local anesthetic might be a common finding produced by unintended ...
Scheller Christian - - 2008
The intermediate nerve is seldom identified as the site of tumor origin in cerebellopontine angle schwannomas. A 29-year-old man presented with a 6-month history of slowly progressive hearing loss and dizziness; facial nerve weakness was not observed clinically. Magnetic resonance imaging revealed a tumor in the left cerebellopontine angle region ...
Bahmani Kashkouli Mohsen - - 2008
A 40-year-old man presented with a sudden severe headache and complete right-sided ptosis. Neuro-ophthalmic examination revealed a right oculomotor nerve palsy. Computed tomography of the brain showed a round isodense intrasellar mass. Magnetic resonance imaging demonstrated a pituitary tumor with some areas of infarction and invasion into the right cavernous ...
Merlini Laura - - 2008
Perineuroma, rare in children, presents as a painless mononeuropathy of a major nerve trunk. Resection of the lesion with end-to-end sural nerve grafting appears to be the treatment of choice. This technique is not recommended if the unhealthy segment of nerve is too long or if spinal roots are involved. ...
Adachi M - - 2008
A 36-year-old woman presented with glossopharyngeal and vagus nerve palsy, which proved to be herpes zoster based on the high titers of Varicella zoster virus antibody in her serum. Thin-section T1-weighted images with contrast media demonstrated swelling and distinct contrast enhancement of the glossopharyngeal and vagus complex, mimicking a tumor. ...
Mori Shintaro - - 2008
OBJECTIVE: The inferior alveolar nerve is the third branch (V3) of the trigeminal nerve and one of the important nerves in dental treatment clinically. In particular, in the assessment of nerve invasion by malignant tumors of jaw bone, diagnostic imaging of the inferior alveolar nerve is essential. The purpose of ...
Peter L M - - 2008
We report a patient with scleromyxoedema and peripheral neuropathy treated successfully with thalidomide. An objective evaluation was carried out using histopathology, cutaneous ultrasonography and magnetic resonance imaging (MRI). A 67-year-old woman presented with a leonine face, generalized thickened skin, an underlying peripheral neuropathy and a monoclonal gammopathy. She was treated ...
Koczman Jacob J - - 2008
PURPOSE: To report a case series of neuro-ophthalmic sarcoidosis manifestations from a predominantly Caucasian Midwest population. DESIGN: Retrospective non-comparative case series and literature review. PARTICIPANTS: Twenty patients with biopsy proven sarcoidosis cases and neuro-ophthalmic manifestations. METHODS: We reviewed 67 consecutive charts with the clinical diagnosis of neurosarcoidosis at the University ...
Veillon F - - 2008
A good examination in facial nerve imaging (CT or MR imaging) depends on a good knowledge of anatomy. Two clinical situations must be considered: imaging of patients with or without facial palsy. CT and MR imaging are very useful when the symptoms are atypical or progressive: MR imaging gives very ...
Mitchell John P - - 2008
Lateral rectus muscle (LRM) palsy due to a nuclear or fascicular sixth nerve lesion is rare as the presenting sign of multiple sclerosis (MS). It is more common to find this palsy in the company of other nearby cranial nerves deficits. Facial numbness in association with a LRM palsy or ...
Casselman Jan - - 2008
Magnetic resonance (MR) imaging is the method of choice to evaluate the cranial nerves. Although the skull base foramina can be seen on CT, the nerves themselves can only be visualized in detail on MR. To see the different segments of nerves I to XII, the right sequences must be ...
Little Andrew S - - 2008
OBJECTIVE: A two-stage approach using orbitozygomatic (OZ) and retrosigmoid (RS) craniotomies is one option for the management of petroclival lesions with supratentorial extension. The goal of this study was to investigate the supratentorial and infratentorial exposures of the clivus obtained through this staged approach. METHODS: Formalin-fixed, silicon-injected specimens underwent stereotactic ...
Becker Minerva - - 2008
Imaging of the trigeminal nerve requires a thorough understanding of its anatomy and function, clinical symptoms related to malfunction, and its key pathologies. Because of the nerve's long course from the brainstem nuclei to the peripheral branches, MR imaging and CT studies have to cover a large anatomic area while ...
Swartz Joel D - - 2008
Imaging of the vestibulocochlear nerve has evolved dramatically over the past few decades. The imaging specialist now is involved in the diagnosis of far more diagnostic entities than ever before. With this increased involvement comes the responsibility to increase collective knowledge regarding the pathophysiology of these diagnostic entities. This article ...
Miller Jonathan P - - 2008
OBJECTIVE: Trigeminal neuralgia (TN) is often associated with neurovascular compression. However, intracranial tumors are occasionally observed, particularly when symptoms are atypical. We describe three patients with Type-1 TN and trigeminal schwannoma diagnosed by magnetic resonance imaging, with concomitant arterial compression of the trigeminal nerve. CLINICAL PRESENTATION: All three patients had ...
Fischbach F - - 2008
BACKGROUND: High-field magnetic resonance imaging (MRI) at 3.0 Tesla (T) is rapidly gaining clinical acceptance. Whether doubling of the field strength of 1.5T and the subsequent increase in signal-to-noise ratio (SNR) leads to a significant improvement of image quality is not automatically given. PURPOSE: To evaluate the depiction of fine ...
Andreisek Gustav - - 2008
To investigate the role of MR imaging (MRI) in the evaluation of peripheral nerve lesions of the upper extremities and to assess its impact on the patient management. Fifty-one patients with clinical evidence of radial, median, and/or ulnar nerve lesions and unclear or ambiguous clinical findings had MRI of the ...
Yamabe Eiko - - 2008
PURPOSE: To prospectively evaluate signal intensity change on T2-weighted magnetic resonance (MR) images and the time course of T2 values and T2 ratios after reinnervation in various nerve injury models in rats. MATERIALS AND METHODS: Institutional animal use and care committee approval was obtained. Thirty male rats made up four ...
Chen Celia S - - 2008
Nonarteritic anterior ischemic optic neuropathy (NAION) is an optic nerve (ON) stroke and a leading cause of sudden ON-related vision loss. A primate (p)NAION model is crucial to further understanding of the clinical disorder and can provide information regarding the pathophysiology of other central nervous system (CNS) ischemic axonopathies. In ...
Karol Eduardo A - - 2009
BACKGROUND: We describe our method and mapping technique of the trigeminal nerve using a quadripolar electrode to minimize morbidity of percutaneous thermocoagulation as treatment of trigeminal neuralgia. METHOD: Of 381 patients selected for postgasserian thermocoagulation, 178 consecutive procedures were carried out using, in most cases, our painless and ambulatory method ...
Righini Andrea - - 2008
OBJECTIVE: Congenital optic nerve head coloboma represents an important cause of childhood visual impairment and blindness; it can be isolated or, more often, it can be associated with several syndromes. Ultrasound has limitations in depicting the posterior aspect of the fetal eye globe, so prenatal information about ocular coloboma are ...
Zhang Zhongwei - - 2008
PURPOSE: To depict the normal anatomy of cranial nerves in detail and define the exact relationships between cranial nerves and adjacent structures with three-dimensional reversed fast imaging with steady-state precession (FISP) (3D-PSIF) with diffusion-weighted MR sequence. MATERIALS AND METHODS: 3D-PSIF with diffusion-weighted MR sequence was performed and axial images were ...
Boretius Susann - - 2008
Neuritis of the optic nerve is one of the most frequent early symptoms of multiple sclerosis. There are only scarce data correlating magnetic resonance imaging (MRI) contrast alterations with the underlying pathology, that is inflammation, demyelination, and axonal damage. Here we studied optic neuritis in a rat model of experimental ...
Watanabe A - - 2008
The subarachnoid space around the optic nerve can be detected by fat-saturated T2-weighted MR imaging of the orbit, and dilation of this space reflects increased intracranial pressure. We examined 3 patients with CSF hypovolemia with MR imaging of the orbit and measured the optic nerve sheath diameter before and after ...
Lorenzoni Josè G - - 2008
OBJECTIVE: To study the influence of the anatomy of neurovascular compression (NVC) on pain outcome in patients with classic trigeminal neuralgia treated by radiosurgery. METHODS: Analysis of the anatomy of the trigeminal nerve, brainstem, and vessels was performed in 89 consecutive patients treated by Leksell gamma knife (Elekta Instruments, Stockholm, ...
Majdani Omid - - 2008
OBJECTIVE: High-precision intraoperative navigation using high-resolution flat-panel volume computed tomography makes feasible the possibility of minimally invasive cochlear implant surgery, including cochleostomy. Conventional cochlear implant surgery is typically performed via mastoidectomy with facial recess to identify and avoid damage to vital anatomic landmarks. To accomplish this procedure via a minimally ...
Weiss Jennifer M - - 2008
We report a rare case of femoral nerve palsy secondary to hematoma compression of the iliacus. The patient presented with pain 2 days after performing a double kick in karate. The femoral nerve symptoms (numbness and weakness) did not begin until 3 to 4 days after the initial trauma. Magnetic ...
Chung Soon-Cheol - - 2008
The purpose of the present study was to develop a magnetic resonance (MR) compatible photoplethysmograph (PPG) system that can measure the raw PPG signal during MR image acquisition. The system consists of an optic sensor that measures the optic signal, an optic cable that transmits a near-infrared optic signal, a ...
Gomes Ana Cláudia Amorim - - 2008
PURPOSE: The purpose of the study was to assess the sensitivity and specificity of maxillary radiographic image findings in predicting nerve lesions in third molar surgery. PATIENTS AND METHODS: A total of 260 third molars were assessed prior to surgical removal by means of panoramic radiography in the sample of ...
Medeiros Felipe A FA Hamilton Glaucoma Center and Department of Ophthalmology, University of California, San Diego, La Jolla, CA 92093-0946, USA. - - 2008
To compare retinal nerve fiber layer (RNFL) and optic disc topographic imaging for detection of optic nerve damage in patients suspected of having glaucoma. Observational cohort study. A cohort of 82 patients suspected of having glaucoma based on the appearance of the optic nerve. All patients were imaged using the ...
Hwang Jeong-Min - - 2008
BACKGROUND: Optic gliomas may unpredictably stabilize or progress. Prognosis was known to be better in patients with neurofibromatosis 1 (NF1) than those with non-NF1. The confusion over management is caused, at least in part, by the uncertain disease course of the tumor. CASE HISTORY: We report here a 13-year-old girl ...
Lim S A - - 2008
Acute visual loss can be caused by retrobulbar optic neuritis, radiation optic neuropathy or ischaemic optic neuropathy. Sinusitis affecting the Onodi cell, a posterior ethmoidal air cell that has encroached on the adjacent sphenoid bone forming the optic canal, can present rarely with visual loss. We report a 60-year-old man, ...
Ni Yusu - - 2008
OBJECTIVE: To investigate an effective method of quantitative analysis of the facial nerve and its adjacent structures on the basis of three-dimensional (3D) CT image reconstruction of the temporal bone. METHODS: The inner structures of the temporal bone from CT images of 34 healthy adults were reconstructed. Precise measurement of ...
Grant P Ellen - - 2008
Recent advances in radiographic imaging technology allow for therapeutic agents to be placed within the subepineurium of peripheral nerve tissue. Adriamycin, a chemotherapeutic agent, is retrogradely transported by nerves to their cell bodies residing in the dorsal root ganglia. The combined process of radiological approach, an understanding of the anatomy ...
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