1,721,008 research outputs found
Papillomi dei plessi corioidei dell'angolo pontocerebellare: considerazioni su una serie di 9 pazienti
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The key role of neuronal nitric oxide synthase in pathogenesis of secondary lesion after aspinal cord injury
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Constitutive nitric oxide synthase (cNOS): a possible key point in pathogenesis of secondary lesion after spinal cord injury.
No full textAnalysis of long-term outcomes and prognostic factors in patients with non-small cell lung cancer brain metastases treated by gamma knife radiosurgery.
No full textChoroid plexus papilloma of the cerebello-pontine angle
No full textThe clinical symptoms, neuroradiological findings and post-operative course is described in four patients affected with a choroid plexus papilloma of the cerebello-pontine angle. Clinical criteria (such as the early onset of signs and symptoms of raised intracranial pressure, and the early impairment of the auditory function) and the neuroradiological pictures (the lack of bone lesions, the tumour appearance as a hypodense mass on CT scan, which is well-enhanced after contrast injection) help the neurosurgeon to predict the surgical findings, but they cannot be considered as definite. The prognosis of such tumours is related more to the difficulties of the surgical intervention than to the peculiar properties of the growth
Changes in directly recorded cochlear nerve compound action potentials during acoustic tumor surgery.
No full textDamage to labyrinthine, neural, and vascular structures may possibly account for failure to achieve hearing preservation after removal of small acoustic neuromas. The pathogenesis of auditory impairment is, however, sometimes unclear. Intraoperative monitoring of auditory evoked potentials enables us to study possible correlations between surgical maneuvers and the function of auditory structures and pathways. To this end, simultaneous recording of brainstern auditory evoked potentials and direct cochlear nerve action potentials (CNAPs) was utilized in 14 patients with small (12 to 18 mm) unilateral acoustic neuromas. The latency of the first negative component (N(1)) of the CNAPs proved extremely sensitive in detecting intraoperative auditory damage and was a good predictive index of postoperative auditory outcome. Evaluation of temporal and morphologic CNAP patterns allowed identification of coagulation close to the cochlear nerve, drilling of the internal auditory canal, and removal of the intrameatal portion of the tumor, the most critical steps in hearing preservation. The mechanisms of damage are analyzed and discussed
Intracranial myxoid chondrosarcoma with early intradural growth
No full textChondrosarcomas are extremely rare intracranial cartilaginous tumors of which the myxoid variant is the least reported in the literature. They develop extradurally and generally infiltrate the dura only in advanced stages or at recurrence. We describe the case of a 55-year-old woman with a posterior cranial fossa myxoid chondrosarcoma which had a primarily intradural extension
The role of constitutive nitric oxide synthase (cNOS) in pathogenesis of secondary lesion after spinal cord inury: preliminary results
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