Skull Base Surgery of the Posterior Fossa
78 Fig. 6.3 Ventral foramen magnum meningioma in a 47-year-old female patient. Patient underwent a lower transclival EEA for rem ...
79 Chordomas are rare primary bone tumor thought to arise from transformed notochord remnants with an estimated incidence rate o ...
80 replacement of their gelatinous matrix by carti- laginous tissue. Compared with typical chordo- mas, they normally present in ...
81 The Role of EEA Endoscopic endonasal approaches provide the most direct access to the ventral skull base. Chondrosarcomas (us ...
82 Preoperative Radiological Assessment The evolution of imaging studies improved the preoperative information on the pathologic ...
83 origin), CN VI is pushed inferiorly allowing an EEA to be performed. Similarly, when the tumor has a more inferior origin, as ...
84 approach include removal of involved bone and dura as a part of the approach, which allows a Simpson Grade I resection. The s ...
85 increased CSF pressure as suggested by imaging findings (e.g., dilated ventricles, empty sella, dilated optic nerves). Finall ...
86 posterior fossa meningiomas: from case selection to surgical management. Neurosurg Clin N Am. 2015;26(3):413–26. Gardner PA, ...
Part III Specific Diseases ...
© Springer International Publishing AG 2018 89 W.T. Couldwell (ed.), Skull Base Surgery of the Posterior Fossa, https://doi.org/ ...
90 Natural History and Clinical Presentation PC meningiomas account for approximately 2% of all intracranial meningiomas and 0.1 ...
91 The venous drainage system must be carefully evaluated before planning any skull base approach to the PC region. In particula ...
92 or MR venography [ 13 ]. This is especially rele- vant for transpetrosal approaches in dominant hemispheres [ 13 ]. Apart fro ...
93 The Role of Intraoperative Electrophysiological Neuromonitoring and Safe Anesthetic Techniques The intricate relation of PC m ...
94 bone drilling and dural coagulation, thereby reduc- ing their growth potential [ 12 , 19 ]. This strategy is especially used ...
95 long surgical access route to the tumor, and work- ing in a narrow operative corridor between the optic apparatus, oculomotor ...
96 tumors extending along lower third of the clivus and contralaterally along the ventral brainstem to optimize the surgical tra ...
97 Complications and Their Avoidance Morbidity arising from this approach includes hearing loss, facial weakness, decreased tear ...
98 degree of removal of the vestibulocochlear struc- tures to gain better access along ventral brain- stem, the modifications of ...
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