from Section II - Open Combined Approaches
Published online by Cambridge University Press: 05 October 2021
Intraventricular lesions are challenging pathologies in neurosurgery. Walter Dandy had a major impact in advancing our understanding of the management of these lesions. Furthermore, the introduction of the microscope and microsurgical techniques have improved the surgical outcomes of these lesions. Several approaches have been described to address ventricular lesions, and can be classified anatomically as anterior, lateral, or posterior. The operative corridor for each of these approaches transgresses unaffected neural tissues. Therefore, tailoring the approach to individual patient lesion characteristics and anatomy is crucial to maximize exposure and minimize morbidity. The majority of open and endoscopic approaches to the third ventricle use the interhemispheric anterior transcallosal, frontal transsulcal, or frontal transcortical corridor to access the lateral ventricle. Once inside the lateral ventricle, the operative corridors to the third ventricle include working through the foramen of Monroe (transforaminal approach) for small lesions located in the anterior superior part of the third ventricle, or through the choroidal fissure (transchoroidal or subchoroidal) which provide access to lesions located in, or extending into, the middle or posterior parts of the roof of the third ventricle. In this chapter, we will discuss the transchoroidal, subchoroidal, and combined transchoroidal and subchoroidal approaches to the third ventricle.
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