http://biblioteca.universia.net/verColeccion.do?start=160&id=4348 Mostrando recursos 161 - 180 de 551 es http://biblioteca.universia.net/img/logotipo.jpg http://biblioteca.universia.net/ http://biblioteca.universia.net/ficha.do?id=18097850 The orbitopterional approach is an anterior skull base extension of the pterional approach that provides greater exposure to the anterior cranial fossa, supra– and parasellar regions, and anterior communicating artery complex. We describe the surgical technique in a stepwise manner to create a one–piece orbitopterional craniotomy flap; keyholes for the bone cuts are the MacCarty burr–hole and the anterolateral portion of the inferior orbital fissure. This one–piece technique is less complicat... Andaluz, Norberto; van Loveren, Harry R.; Keller, Jeffrey T.; Zuccarello, Mario http://biblioteca.universia.net/ficha.do?id=18097851 http://biblioteca.universia.net/ficha.do?id=18113872 One hundred temporal bones obtained from forensic autopsies were dissected to expose injured structures. Longitudinal fractures were present in 82%, transverse fractures in 11%, and mixed fractures in 7% of the cases. Facial canal injuries were present in almost half of the bones with longitudinal fractures (36/82), although cuts of the facial nerve stem were rarely encountered. Damages to the facial canal associated with longitudinal fractures were most frequently seen in the region of the g... Wysocki, Jaros?aw http://biblioteca.universia.net/ficha.do?id=18113873 Fungal mastoiditis caused by Aspergillus fumigatus predominantly occurs in immunocompromised patients. Invasive temporal bone mycoses are rare. They are usually associated with host immunodeficiency, are difficult to diagnose, and many cases are fatal. Treatment consists of antifungal chemotherapy, surgical debridement, and attempts to control the underlying immunological condition. Published reports describe patients with previous ear pathology and associated facial nerve dysfunction. We rep... Amonoo-Kuofi, Kwamena; Tostevin, Phillipa; Knight, Jeff R. http://biblioteca.universia.net/ficha.do?id=18113874 Malignant myoepitheliomas are rare tumors of salivary glands. Most occur in the parotid gland; few other sites of origin are described. Malignant myoepithelioma of the rhinopharynx has only been reported twice. Because the lesion is so rare, there are no specific indications for its treatment. We present a third case of malignant myoepithelioma in the rhinopharynx and discuss its diagnostic and therapeutic aspects. Magliulo, Giuseppe; Pulice, Gianna; Fusconi, Massimo; Cuiuli, Giuseppe http://biblioteca.universia.net/ficha.do?id=18113875 Most intracranial aneurysms can be managed with either microsurgical clipping or endovascular coiling. A subset of complex aneurysms with aberrant anatomy or fusiform/dolichoectatic morphology may require revascularization as part of a strategy that occludes the aneurysm or parent artery or both. Bypass techniques have been invented to revascularize nearly every intracranial artery. An aneurysm that will require a saphenous vein bypass is one that cannot be treated with conventional microsurg... Quiñones-Hinojosa, Alfredo; Du, Rose; Lawton, Michael T. http://biblioteca.universia.net/ficha.do?id=18113876 The superficial temporal artery to middle artery bypass is a technique that allows the blood supply from the extracranial carotid circulation to be routed to the distal middle cerebral artery branches. The procedure allows blood flow to bypass proximal lesions of the intracranial vasculature. The performance of this bypass requires specialized microvascular training and the use of microvascular techniques. The techniques involved in performing these procedures include microdissection of the s... Newell, David W. http://biblioteca.universia.net/ficha.do?id=18113877 http://biblioteca.universia.net/ficha.do?id=18114614 Missile injuries of the anterior skull base usually occur during war or warlike situations. These injuries may be isolated or associated with multiple traumatic injuries. We report 23 such cases managed during military conflicts and peacekeeping operations. All were adult males. Four of these patients sustained bullet injuries; the rest were injured from shrapnel. Eighteen patients had injury to the visual apparatus with permanent blindness. Proptosis was seen in 16, cerebrospinal fluid (CSF)... Bhatoe, Harjinder Singh http://biblioteca.universia.net/ficha.do?id=18114615 Different pathologies may be located at the petrous apex. The primary surgical approaches used to remove such lesions are the pterional, subtemporal, presigmoid, and retrosigmoid. Each has advantages and disadvantages, and the distance to the petrous apex varies with the approach. Anatomical variations in cranial morphology may interfere with these distances. Dolichocephalic skulls have a longer anteroposterior axis than brachycephalic ones. Meneses, Murilo S.; Moreira, Ana Lucila; Bordignon, Kelly C.; Pedrozo, Ari A.; Ramina, Ricardo; Nikoski, Jeziel G. http://biblioteca.universia.net/ficha.do?id=18114616 The authors present guidelines for the ligation of the transverse or sigmoid sinus during the surgical removal of petroclival meningiomas. The medical records and venograms of 14 patients with a petroclival meningioma requiring transverse or sigmoid sinus ligation treated in the Department of Neurosurgery, Seoul National University Hospital between 1986 and 1999 were reviewed. All patients successfully received a sinus trial clamping during the operation. The drainage pattern of the confluens... Hwang, Sung-Kyun; Gwak, Ho-Shin; Paek, Sun-ha; Kim, Dong Gyu; Jung, Hee-Won http://biblioteca.universia.net/ficha.do?id=18114617 An intraorbital arteriovenous malformation became symptomatic without exophthalmos but with chemosis and bruit of the left eye. The patient underwent only surgical treatment. The orbital rim was removed through a fronto-orbital approach. The chemosis was corrected and postoperative magnetic resonance imaging and angiography confirmed complete removal of the malformation. Histopathological examination disclosed an arteriovenous malformation in the extrabulbar fatty tissue without invasion of t... Gil-Salú, J. L.; González-Darder, J. M.; Vera-Román, J. M. http://biblioteca.universia.net/ficha.do?id=18114618 Verrucous carcinomas are rare tumors that predominantly affect the head and neck region. A paradox of slow, aggressive invasion, apparent lymphadenopathy, yet seemingly bland histopathology, they can beguile unwary clinicians into multiple diagnostic biopsies and regional lymphadenectomy. We report a rare verrucous carcinoma of the temporal bone associated with extensive destruction around the skull base. Placed in the context of the few reports involving this site, extratemporal spread may b... Pleat, Jonathon Michael; Bradley, Michael; Orlando, Antonio; Rigby, Howard http://biblioteca.universia.net/ficha.do?id=18114619 A 46-year-old man presented with a 12-month history of a slow-growing mass at the right anterior temporal and superior parotid region. He had a history of chronic otitis media and had undergone a modified radical mastoidectomy for cholesteatoma 5 years earlier. Physical examination revealed a sinus tract and diffuse soft tissue mass measuring 4 cm in diameter spread throughout the region of the right anterior temporal and superior parotid areas. Magnetic resonance imaging (MRI) showed three s... Ulku, Cagatay Han; Uyar, Yavuz; Kocaogullar, Yalc?n; Avunduk, Mustafa Cihat http://biblioteca.universia.net/ficha.do?id=18114620 The optimal management of benign meningiomas of the skull base is reviewed. Elderly patients with small, asymptomatic tumors can be observed and treatment can be initiated if and when progression occurs. Patients with tumors that appear to be amenable to complete resection with an acceptable rate of morbidity are optimally treated with surgery. Decompression of more extensive tumors through conservative subtotal resection and preservation of the involved cranial nerves may result in improved ... Mendenhall, William M.; Friedman, William A.; Amdur, Robert J.; Foote, Kelly D. http://biblioteca.universia.net/ficha.do?id=18114621 Despite being the foundation of, or supplement to, many skull base exposures, the retrolabyrinthine approach has not been adequately illustrated in the skull base literature. As an aid to skull base surgeons in training, this article provides a step-by-step description of the microsurgical anatomy and operative nuances of this important technique. Russell, Stephen M.; Roland, J. Thomas; Golfinos, John G. http://biblioteca.universia.net/ficha.do?id=18114622 http://biblioteca.universia.net/ficha.do?id=18114623 A retrospective review of 53 consecutive patients who underwent a retrosigmoid vestibular nerve section (VNS) or microvascular decompression (MVD) through a modified suboccipital craniectomy with a minimum follow-up of 2 years was performed. Technical modifications to the suboccipital craniectomy included a skin incision designed to avoid the lesser and greater occipital nerves; a small, 2-cm diameter craniectomy with no intradural drilling of bone; and a simplified closure to prevent muscle ... Silverman, Damon A.; Hughes, Gordon B.; Kinney, Sam E.; Lee, Joung H. http://biblioteca.universia.net/ficha.do?id=18114624 Facial nerve outcomes and surgical complication rates for other cranial nerves were evaluated retrospectively after the resection of large acoustic neuromas. The charts of all patients who underwent surgical removal of an acoustic neuroma between 1992 and 2001 at New York University Medical Center were reviewed. Fifty-four patients with tumors measuring 3 cm or larger were included in the study. Four patients had neurofibromatosis type 2, two of whom underwent bilateral removal of acoustic ne... Roland, J. Thomas; Fishman, Andrew J.; Golfinos, John G.; Cohen, Noel; Alexiades, George; Jackman, Alexis H. http://biblioteca.universia.net/ficha.do?id=18114625 This study was conducted to show that high-resolution magnetic resonance imaging (MRI) can aid in the neurosurgical approach to lesions affecting the cranial nerves (CNs) in the cerebellopontine angle (CPA). Three patients with symptomatology related to CNs VII and VIII underwent MRI examinations performed on a 1.5-Tesla Siemens MR scanner. As part of these routine examinations, the imaging technique of constructive interference in the steady state (CISS) was used to collect a volume of data ... Rabinov, James D.; Barker, Frederick G.; McKenna, Michael J.; Curtin, Hugh D.