Historical Aspects The “workhorse of skull base neurosurgery,” the orbitozygomatic approach (OZA) is a highly versatile surgical technique that provides access to lesions involving the orbital apex, cavernous sinus, anterior and middle fossa floor, and posterior fossa cisterns, and minimizes…
Introduction Meningiomas are the second most common tumor in the parasellar region, less frequent than only pituitary adenomas. While most often histopathologically benign, their development in close apposition to critical neurovascular structures can render their surgical management challenging, highlighted by…
The surgical management of intraorbital tumors requires a thorough understanding of not only orbital anatomy but also the objectives of surgical intervention. The orbital contents abut the skull base, paranasal sinuses, and intracranial compartment or anterior cranial fossa. The orbit…
Acknowledgments The author acknowledges the contributions of Daniel M Prevedello, MD (Columbus, OH – USA) and Cristian Ferrareze Nunes, MD (Passo Fundo, RS – Brazil) to the preparation and completion of this chapter. Introduction The foramen magnum (FM) comprises a…
Introduction and Classification Meningiomas in the posterior fossa are a heterogeneous group of lesions in which anatomic location in relationship to the bony and neurovascular structures is key to predict their complexity during resection and to choose the most favorable…
Anatomy of the Clivus The clivus a midline osseous anatomic structure in the skull base formed by the body of the sphenoid bone and the clival part of the occipital bone. Both bones join in a flat surface, the spheno-occipital…
Surgical Methods and the History Surgery of the cavernous sinus was first developed by pioneers Parkinson and Dolenc in the 1960–80s, mainly for cavernous sinus aneurysms. , It was gradually applied to cavernous sinus tumors, by parallel development of bypass…
Sphenoid wing meningiomas (SWMs) constitute about 14% to 20% of intracranial meningiomas. Although they originate from arachnoid cells, they are usually attached to dural thickening or folding, from which they receive their blood supply. Infiltration of the adjacent bone is…
Acknowledgment In memory of Axel Perneczky. The authors and the editors thank Dr. Shaan Raza and Dr. Rodrigo Ramos-Zuniga for their contribution in the previous edition. The fundamental basis of “keyhole” neurosurgery lies in the fact that, if designed and…
Acknowledgment We are very grateful to Marc Matthes, M.Sc., for helping with the creation of Figs. 25.8–25.14 . Surgical Anatomy Meningiomas arising in the midline of the anterior fossa are generally separated into the more rostral olfactory groove meningiomas and…