http://biblioteca.universia.net/verColeccion.do?start=20&id=4348 Mostrando recursos 21 - 40 de 551 es http://biblioteca.universia.net/img/logotipo.jpg http://biblioteca.universia.net/ http://biblioteca.universia.net/ficha.do?id=14344449 Objective: Skull base anatomy is complex and subject to individual variation. Understanding the complexity of surgical anatomy is faster and easier with virtual models created from primary imaging data of the patient. This study was designed to investigate the usefulness of virtual reality in image guidance for skull base procedures. Design: Primary volumetric image data from 110 patients was acquired using magnetic resonance, computed tomography (CT), and CT angiography. Pathologies included... Rosahl, Steffen K.; Gharabaghi, Alireza; Hubbe, Ulrich; Shahidi, Ramin; Samii, Madjid http://biblioteca.universia.net/ficha.do?id=16432356 Origitano, Thomas C. http://biblioteca.universia.net/ficha.do?id=16432357 Lawton, Michael T. http://biblioteca.universia.net/ficha.do?id=16432358 Day, J. Diaz http://biblioteca.universia.net/ficha.do?id=16432359 A patient with an intracranial skull base alveolar soft-part sarcoma, thought on preoperative imaging to be a meningioma, is presented. The mass was removed and identified by pathological evaluation to be an alveolar soft-part sarcoma. Postoperative investigation revealed widespread systemic disease. The histologic and clinical characteristics of this unusual tumor and the implications for prognosis and treatment are discussed. Cohen, David B.; Jones, David M.; Fergus, Allan H.; Qian, Jiang; Schwartz, Marc S. http://biblioteca.universia.net/ficha.do?id=16432360 Thumfart, Walter F.; Freysinger, Wolfgang http://biblioteca.universia.net/ficha.do?id=16432361 A 55-year-old male patient presented with a giant olfactory groove meningioma supplied by both ophthalmic arteries. The tumor was debulked through a bifrontal craniotomy, but the surgery was discontinued because of extensive blood loss. During a second operation, the dura of the frontal base was dissected extradurally before the tumor was removed. The meningeal blood supply was occluded with bipolar coagulation of the epidural meningeal vessels around the crista galli. The highly vascular tum... Wei, Chih-Peng; Wang, Alexander D.; Tsai, Ming-Dar http://biblioteca.universia.net/ficha.do?id=16432362 The etiology, pathogenesis, histopathologic diagnosis, prognosis, and treatment of giant cell reparative granulomas of the skull are controversial. We report a 14-year-old girl with an advanced recurrent giant cell reparative granuloma of the skull base and paranasal sinuses whose only clinical manifestation was a loss of vision. After undergoing endovascular catheter embolization, the patient underwent repeated surgical resections of the mass via a combined frontobasal and modified infratemp... Plontke, Stefan K.-R.; Adler, Claus-Peter; Gawlowski, Jan; Ernemann, Ulrike; Friese, Sigrid A.; Plinkert, Peter K. http://biblioteca.universia.net/ficha.do?id=16432363 Meningiomas represent 3 to 12% of the tumors that involve the cerebellopontine angle and internal auditory canal (IAC). Intracanalicular meningiomas, however, are rare. Only 10 well-documented cases have been reported in the English literature. The differential diagnosis includes acoustic neuromas, facial nerve neuromas, hemangiomas, lipomas, and meningiomas. We report two new cases of intracanalicular meningioma. Both patients had unilateral tinnitus. In case 1, the patient also experienced ... Magliulo, Giuseppe; Zardo, Francesco; Bertin, Serena; D'Amico, Raffaello; Savastano, Vincenzo http://biblioteca.universia.net/ficha.do?id=16432364 Quantitative data from a recent human cadaveric study suggested that removal of the lateral orbital rim alone may be sufficient to reach many targets for which the orbitozygomatic craniotomy has been used. Consequently, a lateral orbital rim osteotomy was substituted for an orbitozygomatic craniotomy in seven patients with a variety of pathologies located in the anterior, middle, and interpeduncular fossae. In each case, lateral orbitotomy provided a satisfactory surgical corridor for diagnos... Pritz, Michael B. http://biblioteca.universia.net/ficha.do?id=16432365 Alexander, Michael J. http://biblioteca.universia.net/ficha.do?id=16432366 http://biblioteca.universia.net/ficha.do?id=16432367 http://biblioteca.universia.net/ficha.do?id=16432368 Laedrach, Kurt; Remonda, Luca; Lukes, Anton; Schroth, Gerhard; Raveh, Joram http://biblioteca.universia.net/ficha.do?id=16432369 Laedrach, Kurt; Remonda, Luca; Lukes, Anton; Schroth, Gerhard; Raveh, Joram http://biblioteca.universia.net/ficha.do?id=16434151 Casey, Adrian; Crockard, H. A. http://biblioteca.universia.net/ficha.do?id=16434152 Non-Hodgkin's lymphoma (NHL) is a rare tumor of the skull base. As the incidence of primary central nervous system (CNS) lymphoma has increased, atypical presentations involving the skull or cranial base exclusively have been reported. In immunocompetent patients with no previous history or predisposing factors, the diagnosis of primary NHL of the skull base may be delayed. We present four cases of nasal and paranasal sinus NHL with both skull base and intracranial involvement in immunocompet... Dare, Amos O.; Datta, Rajiv V.; Loree, Thom R.; Hicks, Wesley L.; Grand, Walter http://biblioteca.universia.net/ficha.do?id=16434153 http://biblioteca.universia.net/ficha.do?id=16434154 Invasive meningiomas involving the medial sphenoid wing are difficult tumors to resect completely. They often have invaded the surrounding arteries at the time of diagnosis making total resection challenging. Attempts at removing these tumors from adherent carotid or middle cerebral arteries have resulted in high complication rates. Nine cases of medial sphenoid wing meningiomas with arterial invasion were operated between March 1994 and August 1998. Total resection was possible in only four ... Kattner, Keith A.; Fukushima, Takanori http://biblioteca.universia.net/ficha.do?id=16434155 Although craniopharyngiomas account for a large percentage of pediatric intracranial tumors, there is a bimodal age distribution. Most of these neoplasms are suprasellar or sellar in location. In this report we describe an unusual case of an infrasellar craniopharyngioma in a child. Only four previous cases of infrasellar craniopharyngiomas with no sellar involvement have been described. Infrasellar craniopharyngiomas are part of the continuum representing intracranial craniopharyngiomas and ... Deutsch, Harel; Kothbauer, Karl; Persky, Mark; Epstein, Fred J.; Jallo, George I.