Indications and Preoperative Considerations • Meningiomas represent 34% of all primary brain tumors, originate from the arachnoid cells in the brain and spine and are histologically non-cancerous lesions. • Anterior…
Preoperative Considerations • Meningiomas accounts for 77% of all non-cancerous intradural, extramedullary tumors of the craniocervical junction. • The foramen magnum (FM) region is a complex surgical area. Tumors may…
Preoperative Considerations • Vestibular schwannomas (VSs) or acoustic neuromas arise from the Schwann cells forming the sheath (covering) of the vestibulocochlear nerve. Most of these tumors arise from the superior…
The orbit is an area that neurosurgeons may approach for orbital tumors with an intracranial component or as a corridor to access the anterior cranial fossa. Approaches to the orbit…
In this chapter we will introduce the anatomy and some key steps for the three most relevant approaches to the temporal bone for the neurosurgeon: the subtemporal or middle fossa…
Preoperative Considerations • The parasellar region is an extensive area that includes the structures that surround the sella turcica. It includes laterally the dural walls of the cavernous sinus, which…
Indications • Subfrontal approaches are mainly used to access the floor of the anterior cranial fossa, anterior midline parasellar structures, like the tuberculum sellae, anterior communicating artery, optic chiasm, posterior…
Indications and Preoperative Considerations • Meningiomas are one of the most frequently occurring intracranial primary tumors. Sphenoid wing meningiomas (SWMs) represent up to 18% of intracranial meningiomas. Those are anatomically…
Preoperative Considerations • Pituitary adenomas are benign epithelial neoplasms derived from the pituitary glands. In the absence of a macroscopic capsule, those lesions can infiltrate adjacent structures such as the…
Preoperative Considerations • Chordomas are locally aggressive neoplasms that arise from embryonic remnants of the notochord along the vertebral axis. They represent less than 1% of all intracranial neoplasms. They…
