Combined Staged Telo-Velar and Trans-Choroidal Approach to a Tumor of the Sylvian Aqueduct

Exposition of the Fourth Ventricle

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In this segment, we see the approach to the fourth ventricle after dural opening, the bilateral dissection of the tonsillomedullary fissures, and the exposition of the tumor.


  • Tonsillomedullary fissure
  • Telovelar approach
  • Posterior Inferior Cerebellar Artery
  • Foramen of Magendie
  • Thela Chorioidea
  • Obex
  • Striae medullares
  • Median sulcus
  • Facial colliculus
  • Superior fovea

About this video

Giuseppe Cinalli
Nicola Onorini
First online
17 May 2019
Online ISBN
Springer, Cham
Copyright information
© The Author(s) 2020