Journal of neurosurgery
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Journal of neurosurgery · Mar 2002
Trigeminal schwannomas: removal of dumbbell-shaped tumors through the expanded Meckel cave and outcomes of cranial nerve function.
As in patients with vestibular schwannomas, advances in surgical procedures have markedly improved outcomes in patients with trigeminal schwannomas. In this article the authors address the function of cranial nerves in a series of patients with trigeminal schwannomas that were treated with gross-total surgical removal. The authors emphasize a technique they use to remove a dumbbell-shaped tumor through the expanded Meckel cave, and discuss the advantage of the extradural zygomatic middle fossa approach for total removal of tumor and preservation or improvement of cranial nerve function. ⋯ Preservation or improvement of cranial nerve function can be achieved through total removal of a trigeminal schwannoma, and skull base approaches are better suited to achieving this goal. The zygomatic middle fossa approach is particularly helpful and safe. It allows extradural tumor removal from the cavernous sinus, the infratemporal fossa, and the posterior fossa through the expanded Meckel cave.
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Journal of neurosurgery · Mar 2002
Review Case ReportsPrimary low-grade B-cell lymphoma of mucosa-associated lymphoid tissue of the dura mimicking the presentation of an acute subdural hematoma. Case report and review of the literature.
The authors present the case of a 64-year-old woman who experienced a left hemiparesis. An initial diagnosis of subdural hematoma was made based on results of computerized tomography scanning. ⋯ The authors outline the natural history of central nervous system lymphomas and of MALT lymphomas in other tissues. They review seven previously reported cases and emphasize the importance of recognizing these tumors as a distinct clinicopathological entity.
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Journal of neurosurgery · Mar 2002
Apoptosis of T lymphocytes invading glioblastomas multiforme: a possible tumor defense mechanism.
The goal of this study was to investigate whether apoptosis occurs in T lymphocytes that invade Fas ligand (FasL)-expressing glioblastomas multiforme (GBMs) and if its induction could be mediated by Fas. ⋯ On the basis of the data presented in this paper, the authors suggest that GBM cells that express FasL can induce apoptosis in invading immune cells. This phenomenon may play an important role in these tumors' maintenance of immune privilege and evasion of immune attacks. Awareness of this phenomenon should be helpful for the development of novel strategies for treatment of malignant gliomas.
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Journal of neurosurgery · Mar 2002
Case ReportsEndovascular treatment of an internal carotid artery pseudoaneurysm following transsphenoidal surgery. Case report.
Internal carotid artery (ICA) pseudoaneurysm formation following transsphenoidal surgery is a rare but potentially lethal complication. Direct surgical repair with preservation of the ICA may be difficult. The feasibility of endovascular coil embolization with parent artery preservation for an iatrogenic ICA pseudoaneurysm is undefined. ⋯ Stent-assisted coil embolization of this iatrogenic pseudoaneurysm was successful in achieving complete, angiographically confirmed aneurysm obliteration, with preservation of the ICA and short-term prevention of hemorrhage or carotidcavernous fistula. The endovascular method provided an effective, relatively low-risk treatment for this difficult lesion, and was an excellent alternative to direct surgical repair. Nonetheless, long-term follow-up review is required before definitive treatment recommendations can be made.
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Journal of neurosurgery · Mar 2002
Brachial plexus neurotization with donor phrenic nerves and its effect on pulmonary function.
To examine possible side effects of neurotizations in which the phrenic nerve was used, pulmonary function was analyzed pre- and postoperatively in patients with brachial plexus injury and root avulsions. ⋯ When the right phrenic nerve is used as a donor in neurotization of the musculocutaneous nerve, the patient incurs a higher risk of reduced pulmonary VC. If possible, the left phrenic nerve should be preferred. The Pi(max) has to be determined preoperatively to avoid any further decrease in the already reduced pulmonary function due to the initial injury.