http://biblioteca.universia.net/verColeccion.do?start=120&id=4348 Mostrando recursos 121 - 140 de 551 es http://biblioteca.universia.net/img/logotipo.jpg http://biblioteca.universia.net/ http://biblioteca.universia.net/ficha.do?id=16434269 Schwannomas of the olfactory groove are rare tumors. Only 10 have been reported in the past century. The case of a 59-year-old woman with an isolated olfactory schwannoma with cribriform plate erosion is presented. Carron, Jeffrey D.; Singh, Ran Vijai P.; Karakla, Daniel W.; Silverberg, Marc http://biblioteca.universia.net/ficha.do?id=16434270 Casey, Kenneth F.; Jannetta, Peter J. http://biblioteca.universia.net/ficha.do?id=16434271 Pensak, Myles L. http://biblioteca.universia.net/ficha.do?id=16434272 Objective: Trans-sphenoidal surgery is often combined with other approaches for the treatment of middle cranial base tumors. By combining a maxillotomy with trans-sphenoidal approach, significantly wider exposure to these regions is gained. However, endoscope-assisted techniques have also been used for sellar and parasellar and upper clival regions. Methods: An extended trans-sphenoidal approach was performed on 10 cadaver heads using the operating microscope and was repeated with a 0-degree ... Batay, Funda; Vural, Emre; Karasu, Aykut; Al-Mefty, Ossama http://biblioteca.universia.net/ficha.do?id=16434273 Chronic otitis media, unlike trauma, seldom leads to the development of tension pneumocephalus. Rarely, it occurs as a complication of mastoid surgery. A Melanesian woman sought treatment for loss of speech, hemiparesis, and headache 4 weeks after undergoing canal-down mastoidectomy for cholesteatoma. The tension pneumocephalus was decompressed urgently by aspirating air via a cannula through the burr hole, and the mastoid cavity was obliterated. She recovered completely. Twelve additional pa... Dubey, Siba P.; Jacob, Ollapalili; Gandhi, Mitesh http://biblioteca.universia.net/ficha.do?id=16434274 http://biblioteca.universia.net/ficha.do?id=18097816 This prospective open pilot study was designed to assess the suitability of flexible composite sheets of polymer and hydroxyapatite (HA) for the reconstruction of limited lateral skull base defects through a conservative transmastoid approach. Zanetti, Diego; Nassif, Nader http://biblioteca.universia.net/ficha.do?id=18097817 This study was conducted to identify clinical and histologic factors that would influence, independently of tumor staging, postoperative facial function after removal of a vestibular schwannoma. A prospective study was performed on 35 consecutive patients with vestibular schwannomas who underwent the translabyrinthine approach. Facial function was assessed before and 1 year after surgery. The factors that influenced the postoperative outcome of the facial function independently of tumor stagi... Couloigner, Vincent; Gervaz, Elena; Kalamarides, Michel; Ferrary, Evelyne; Rey, Alain; Sterkers, Olivier; Hénin, Dominique http://biblioteca.universia.net/ficha.do?id=18097818 The aim of this investigation was to evaluate the suitability and usefulness of the Stealth Station™ intraoperative guiding system (Medtronic Sofamor Danek, Memphis, TN) in a variety of indications. Eleven intraoperative image–guided procedures were performed for anterior or lateral skull base lesions. The most common neurosurgical approaches included frontal, coronal, and parietotemporal access. Neuronavigation reliably allowed the extent of tumor configuration and risk zones (e.g., blood ve... Wiltfang, Joerg; Rupprecht, Stephan; Ganslandt, Oliver; Nimsky, Christopher; Keßler, Peter; Schultze–Mosgau, Stefan; Fahlbusch, Rudolf; Neukam, Friedrich Wilhelm http://biblioteca.universia.net/ficha.do?id=18097819 The site of origin, projection, and relationship of aneurysms arising from the ophthalmic segment of the internal carotid artery (ICA) to adjacent structures are heterogeneous. Based on a retrospective analysis of 61 patients with aneurysms in this location, we developed a simple numerical classification system to guide surgical planning. We used angiographic findings to categorize the aneurysms. We followed the nomenclature of the carotid segments by Bouthillier et al (Neurosurgery 1996;38:4... Barami, Kaveh; Hernandez, Vladimir S.; Diaz, Fernando G.; Guthikonda, Murali http://biblioteca.universia.net/ficha.do?id=18097820 Computer–aided surgery (CAS) based on high–resolution imaging techniques represents an important adjunct to precise intraoperative orientation when anatomical landmarks are distorted or missing. Several commercial systems, mostly based on optical or electromagnetic navigation principles, are on the market. This study investigated the application of EasyGuide®, VectorVision®, and InstaTrak® CAS systems in ENT surgery under practical and laboratory conditions. System accuracy, time required, ha... Ecke, U.; Luebben, B.; Maurer, J.; Boor, S.; Mann, W. J. http://biblioteca.universia.net/ficha.do?id=18097821 Most meningiomas are slow–growing tumors that do not rapidly recur after subtotal removal. After subtotal resection of a meningioma a 47–year–old woman developed a large extracranial recurrence 1 year later. The recurrence was resected successfully. On histological examination the typical characteristics of a meningioma were absent. Based on immunohistological and ultrastructural studies, the tumor was classified as a grade III meningioma of the newly recognized rhabdoid subtype. Jansen, Jeroen C.; Turner, Jenny; Sheehy, John; Fagan, Paul A. http://biblioteca.universia.net/ficha.do?id=18097822 Laws, Edward R.; Weiss, Martin H.; White, William L. http://biblioteca.universia.net/ficha.do?id=18097823 http://biblioteca.universia.net/ficha.do?id=18097824 This study compared mandibular distraction and vertical ramus osteotomy in terms of their effectiveness at increasing access to the cranial base and distal internal carotid artery. Five fresh–frozen cadavers were used to obtain a total of ten cranial base exposures. The following two techniques were evaluated on each of the ten exposures: (1) anterior distraction of the mandible without violation of the temporomandibular joint capsule, and (2) vertical ramus osteotomy of the mandible with dis... Devlin, Michael A.; Hoffmann, Keith D.; Johnson, Walter D. http://biblioteca.universia.net/ficha.do?id=18097825 Cerebrospinal fluid (CSF) rhinorrhea is a common condition managed by most otolaryngologists with the help of nasal endoscopy (sinoscopy). In the last 2 years, we have used a neuroendoscope with a working sheath to treat nine patients with CSF rhinorrhea. One patient developed a recurrence 1 month after treatment but then responded to conservative treatment. We conclude that the treatment of CSF rhinorrhea by a neuroendoscope with a working sheath is safe, effective, and easy and obviates the... Husain, Mazhar; Jha, Deepak; Vatsal, Devendra K.; Husain, Nuzhat; Gupta, Rakesh K. http://biblioteca.universia.net/ficha.do?id=18097826 Sarcomas of the skull base occurring in the field of prior radiotherapy are rare; only a few have been reported in the English literature. We report a fatal osteosarcoma of the skull base arising in a patient with McCune–Albright syndrome and severe fibrous dysplasia of the skull base 22 years after radiation therapy for a pituitary adenoma. This malignancy fulfills Cahan's criteria for a radiation–induced tumor in that it arose in the radiation field of a pituitary adenoma with a latency of ... Hansen, Marlan R.; Moffat, J. Craig http://biblioteca.universia.net/ficha.do?id=18097827 The choice of surgical approach to tumors of the cranial base in children is determined by strict criteria. The criteria include optimal visibility for the surgeon, minimal possible impairment of facial skull growth, and the preservation of motor and sensory nerve integrity. From 1993 to 1996, three children (6 years old, 22 months old, 6 months old, respectively) underwent surgery to resect cranial base tumors through a modified lateral transmandibular approach. In all three patients a preau... Kuettner, Christian; Samii, M.; Hausamen, J. E. http://biblioteca.universia.net/ficha.do?id=18097828 Cavernous hemangiomas of the cavernous sinus belong to a well–distinguished entity of extra–axial cavernous hemangiomas located in the cavernous sinus and have a typical appearance on magnetic resonance imaging (MRI). Severe intraoperative bleeding has been described during the excision of these lesions that is probably associated with their pathological features. An atypical case of a sclerosing lesion with distinct MRI features is described. In these particular cases, especially with giant ... Aversa do Souto, Antonio; Marcondes, Jorge; Reis da Silva, Marcello; Chimelli, Leila http://biblioteca.universia.net/ficha.do?id=18097829 A patient with an intraorbital hydatid cyst was treated successfully through a transmaxillary approach. Numerous procedures to remove intraorbital hydatid cysts are discussed. Selçuklu, Ahmet; Öztürk, Mustafa; Külahl?, ?smail; Do?an, Hakk?