Anatomic Variations of the Floor of the Third Ventricle: An Endoscopic Study

Abstract Objective Anatomical variations of the floor of the third ventricle (FTV) are common in hydrocephalic patients and can significantly affect outcomes of endoscopic third ventriculostomy (ETV). We sought to categorize variations in third ventricle anatomy and to discuss the implications of th...

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Bibliographic Details
Published in:World neurosurgery 2016-06, Vol.90, p.211-227
Main Authors: Sughrue, Michael, M.D, Chiou, Judy, M.B.B.S, Burks, Joshua D., B.A, Bonney, Phillip A., B.S, Teo, Charles, M.B.B.S
Format: Article
Language:English
Subjects:
Anatomic Landmarks - abnormalities
Anatomic Landmarks - pathology
Anatomy
Endoscopic
Endoscopy
Floor
Humans
Hydrocephalus - pathology
Intraventricular
Neuroendoscopy
Neurosurgery
Photography
Reproducibility of Results
Sensitivity and Specificity
Third ventricle
Third Ventricle - abnormalities
Third Ventricle - pathology
Video Recording - methods
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Summary:Abstract Objective Anatomical variations of the floor of the third ventricle (FTV) are common in hydrocephalic patients and can significantly affect outcomes of endoscopic third ventriculostomy (ETV). We sought to categorize variations in third ventricle anatomy and to discuss the implications of these variations for ETV. Methods Intraoperative videos and pictures of 50 patients who underwent ETV between April 2001 and August 2010 were reviewed. Twenty-seven patients with clearly demonstrable third ventricular floors that satisfied our criteria were selected for the study. Results Images of variations were organized into the following categories: (1) Thinned floor, (2) Thickened floor, (3) Partially effaced floor, (4) Ballooning/herniating floor, (5) Small prepontine interval, (6) Narrowed third ventricle, (7) Other significant anomalies. Conclusion The third ventricle is a common site for anatomical variations in hydrocephalic patients. A good knowledge of these variations is essential before performing ETV, as they have the potential to increase operative risk.
ISSN:1878-8750
1878-8769
DOI:10.1016/j.wneu.2016.02.037