http://biblioteca.universia.net/verColeccion.do?start=40&id=4348 Mostrando recursos 41 - 60 de 551 es http://biblioteca.universia.net/img/logotipo.jpg http://biblioteca.universia.net/ http://biblioteca.universia.net/ficha.do?id=16434156 Al-Mefty, Ossama; Sekhar, Laligam N.; Sen, Chandranath; van Loveren, Harry R. http://biblioteca.universia.net/ficha.do?id=16434157 Meningiomas are common intracranial tumors that rarely extend to extracranial sites. When they occur extracranially near the skull base, their diagnosis and management represent tremendous challenges. Although the extracranial component tends to manifest at the same time as the intracranial component, this is not always the case. In the patient reported in this article, 13 years separated the diagnosis of the intracranial tumor from the appearance of an extracranial component. The clinical pr... Al-Sebeih, Khalid; Al-Dhahri, Saleh; Zeitouni, Anthony; Moola, Farhad; Lablanc, Richard; Lessard, Lucie http://biblioteca.universia.net/ficha.do?id=16434158 Baker, N. J.; Evans, B. T. http://biblioteca.universia.net/ficha.do?id=16434159 The translabyrinthine approach is familiar to most neurosurgeons and neuro-otologists and is frequently used to remove acoustic neuromas. Some of the complications associated with this surgery include cerebrospinal fluid (CSF) leaks, meningitis, and rarely fat graft prolapse. The authors report a 60-year-old woman who underwent a translabyrinthine approach and microsurgical resection of a right-sided 1-cm acoustic neuroma. Initially, she was discharged home after an uneventful postoperative c... Das, Kaushik; Murali, Raj; Lindstrom, Christopher J.; Couldwell, William T. http://biblioteca.universia.net/ficha.do?id=16434160 The incidence of cerebrospinal fluid (CSF) fistula after transtemporal skull base surgery can range from 4% to 19%. The risk of CSF leak may be related to tumor size and location, the extent of the dural defect, and the technical aspects of the wound reconstruction. Prevention of meningitis depends on the early detection and management of CSF leakage. Five hundred eighty-nine patients underwent a variety of transtemporal surgical approaches for the extirpation of skull base tumors at our inst... Leonetti, John P.; Anderson, Douglas; Marzo, Sam; Moynihan, George http://biblioteca.universia.net/ficha.do?id=16434161 The objective of this article is to evaluate single-fraction or fractionated stereotactic radiotherapy of central nervous system (CNS) and head and neck lesions using intensity-modulated radiotherapy (IMRT) with a commercially available system (Peacock™, Nomos Corporation, Sewickley, PA). This system allows tomotherapeutic delivery of intensity-modulated radiation, that is, the slice-by-slice treatment of the volume of interest with an intensity-modulated beam, making the delivery of highly c... Ammirati, Mario; Bernardo, Antonio; Ramsinghani, Nilam; Yakoob, Richard; Al-Ghazi, Matthew; Kuo, Jeffrey; Ammirati, Giuseppe http://biblioteca.universia.net/ficha.do?id=16434162 To determine the most effective route to the upper third of the basilar artery, 10 cadaver dissections were performed comparing the exposure gained using the combined pterional/anterior temporal approach and the orbitozygomatic extended approach. Endoscopic evaluation through an eyebrow incision in each dissection helped determine whether any advantage was conferred by the cranial base approach. This also served to assess the benefit of using the endoscope as an adjunct to open procedures in ... Nanda, Anil; Vannemreddy, Prasad S.S.V.; Vincent, David A. http://biblioteca.universia.net/ficha.do?id=16434186 In this study, 31 cases with different anterior skull base lesions mandating broad exposure, including the sphenoidal, parasellar, and clival region, were surgically treated using the frameless computer assisted surgery (CAS) system. The contribution of navigated surgery in relation to the broad exposure and direct visualization of this region rendered by the subcranial-subfrontal approach was evaluated. In group I, consisting of extensive tumors, the contribution of CAS was only given in fiv... Laedrach, Kurt; Remonda, Luca; Lukes, Anton; Schroth, Gerhard; Raveh, Joram http://biblioteca.universia.net/ficha.do?id=16434187 The authors review their experience with endoscopic repair of skull base defects associated with cerebrospinal fluid (CSF) rhinorrhea involving the paranasal sinuses. A total of 22 patients was treated endoscopically between 1992 and 1998. The repair method consisted of closure of the CSF fistula with a free autologous abdominal fat graft and fibrin glue, supported with a sheet of silastic. The primary closure rate was 82% (18/22), and the overall closure rate was 95.5% (21/22) without recurr... Schmerber, S.; Righini, Ch.; Lavielle, J.-P.; Passagia, J.-G.; Reyt, E. http://biblioteca.universia.net/ficha.do?id=16434188 The authors report on their experience with the trans-sinusal frontal approach in removing olfactory groove meningiomas. Six tumors were operated on by the trans-sinusal frontal approach, using a bicoronal incision; two tumors developed on one side, and there were four bilateral olfactosellar tumors. Osteotomy of the anterior wall of the frontal sinus was performed with an oscillating saw without any burr hole. The posterior wall of the sinus was resected and the tumor was attacked through a ... Hallacq, Paul; Moreau, Jean-Jacques; Fischer, Georges; Béziat, Jean-Luc http://biblioteca.universia.net/ficha.do?id=16434189 The authors report on a patient with a greater superficial petrosal nerve neurinoma. The patient developed severe acute facial palsy and the palsy improved soon after removal of the tumor. We review of the literature and describe its rarity and surgical treatment with regard to other facial nerve neurinomas originating from the main trunk of the facial nerve. Aihara, Noritaka; Yamada, Kazuo; Matsuda, Futoshi; Murakami, Shingo http://biblioteca.universia.net/ficha.do?id=16434190 Dionne, David http://biblioteca.universia.net/ficha.do?id=16434191 Transverse-sigmoid sinus dural arteriovenous malformations (DAVM) are uncommon vascular lesions for which complete cure may be difficult to obtain. A wide variety of treatments for these lesions include observation, arterial compression, surgical resection, and endovascular embolization. We propose that transverse-sigmoid sinus DAVM can be completely cured by occluding the ipsilateral dural sinus with detachable balloon and Guglielmi detachable coils (GDC) coils before arterial feeder emboliz... Shownkeen, Harish; Yoo, Kevin; Leonetti, John; Origitano, T.C. http://biblioteca.universia.net/ficha.do?id=16434192 Mattox, Douglas E. http://biblioteca.universia.net/ficha.do?id=16434193 http://biblioteca.universia.net/ficha.do?id=16434194 Traditionally, cadaveric studies and plain-film cephalometrics provided information about craniomaxillofacial proportions and measurements; however, advances in computer technology now permit software-based review of computed tomography (CT)-based models. Distances between standardized anatomic points were measured on five dried human skulls with standard scientific calipers (Geneva Gauge, Albany, NY) and through computer workstation (StealthStation 2.6.4, Medtronic Surgical Navigation Techno... Citardi, Martin J.; Herrmann, Brian; Hollenbeak, Chris S.; Stack, Brendan C.; Cooper, Margaret; Bucholz, Richard D. http://biblioteca.universia.net/ficha.do?id=16434195 Papillary tumors of the middle and inner ear have been interpreted histogenetically in many ways. In 1989 Heffner proposed the endolymphatic sac epithelium as a possible origin. These rare tumors are clinically aggressive and can cause extensive temporal bone destruction. Because of this behavior, endolymphatic sac tumors (ELST) were classified as low-grade adenocarcinomas, although metastasis has not yet been documented. Two papillary neoplasms of the temporal bone are presented, which we be... Schick, Bernhard; Kronsbein, Hartmut; Kahle, Gabriele; Prescher, Andreas; Draf, Wolfgang http://biblioteca.universia.net/ficha.do?id=16434196 Reader, A Concerned http://biblioteca.universia.net/ficha.do?id=16434197 The relationships between the horizontal segment of the internal carotid artery (ICA) and other petrous apex structures was studied in 14 anatomical specimens obtained from routine autopsies and on 10 magnetic resonance images obtained from healthy volunteers. The dissection was performed under an operating microscope using the middle fossa transpetrous approach. A pentagonshaped area of 67.91 mm2 posterior to the trigeminal nerve and bordered by anatomical structures was identified inside th... Mortini, Pietro; Mandelli, Carlo; Gerevini, Simonetta; Giovanelli, Massimo http://biblioteca.universia.net/ficha.do?id=16434198 This study was performed to determine if the arcuate eminence can be drilled down without opening the semicircular canal to obtain a flatter operative field during an anterior or posterior transpetrosal approach. The depth of the superior semicircular canal from the top of the arcuate eminence was measured in 43 dry temporal bones. We found that the arcuate eminence was situated approximately 20 mm from the petrosigmoid intersection, and the superior semicircular canal was located 2.0 mm deep... Katsuta, Toshiro; Matsushima, Toshio; Fukui, Masashi; Rhoton, Albert L.