Related Experiment Video
Updated: Jul 9, 2026

Endoscopic Third Ventriculostomy and Pineal Biopsy from a Single Entry Point
Published on: June 28, 2024
Endoscopic fenestration of the third ventricle in the reverse direction
Kenichi Nishiyama1, Hiroshi Mori, Junichi Yoshimura
1Department of Neurosurgery, Brain Research Institute, University of Niigata, Asahimachi 1, Niigata, 951, Japan. nishiken@d4.dion.ne.jp
Introduction:
A case of safely treated parasellar cyst by endoscopic fenestration of the third ventricular floor from outside of the ventricle to establish communications between the cyst and the ventricle is reported.
Materials And Methods:
During the endoscopic procedures, the anterior commissure and the foramina of Monro could be clearly observed using this approach.
Conclusion:
In treating parasellar cysts with thick walls, endoscopic fenestration of the third ventricular floor in the reverse direction, i.e., from inside of the cyst, should be considered.
