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Perspectives on Endoscopic Transseptal Interforniceal Approach for Retroforaminal Colloid Cysts
Faculty
Medicine
Year:
2021
Type of Publication:
ZU Hosted
Pages:
Authors:
Mohamed Medhat Ali Arnaout
Staff Zu Site
Abstract In Staff Site
Journal:
ًWorld Neurosurgery Elsevier
Volume:
Keywords :
Perspectives , Endoscopic Transseptal Interforniceal Approach , Retroforaminal
Abstract:
Background Although the interforniceal approach with the preservation of the fornix is useful during the endoscopic approach for retroforaminal colloid cysts, it carries a significant risk of memory and cognitive difficulties. Because most reports have reported the endoscopic approach to colloid cysts through the foramen with little emphasis on retroforaminal cysts, the aim of this study was to investigate colloid cysts as a special entity with regard to their different characteristics and surgical approaches and outcomes. Methods In this retrospective study, 12 patients with third ventricular colloid cysts with retroforaminal extensions were included. All patients underwent endoscopic transseptal interforniceal approach with tumor resection. The surgical technique was briefly described, and preoperative and postoperative data were evaluated. Results Among the 12 patients included in this study, most of our patients were males. Average diameter of the colloid cyst was relatively large (average 22 mm). Gross total resection was achieved in 10 cases (83.3%). The stable images showed no local recurrence in the long-term follow-up period except in 1 case at the 28-month follow-up period. Conclusions Retroforaminal colloid cyst represents a unique entity that requires special attention to its mode of growth. The endoscopic approach for retroforaminal colloid cysts is nearly the same as that for foraminal cysts. It has a lower incidence rate of postoperative memory changes, lower chances of total resection, and lower incidence rate of hard contents. Moreover, sufficient knowledge on morbid anatomy is important to avoid fornix injury.
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