Minimally invasive surgical procedure performed through a single hole in the skull (monoportal), with the use of a neuroendoscope to allow the fenestration of the floor of the third ventricle, thus communicating the ventricular system with the subarachnoid space.
The third endoscopic ventriculostomy indications are: Obstructive or Non-Communicating Hydrocephalus (as the main indication) for: Silvio aqueduct stenosis, Tumor obstruction of cerebrospinal fluid circulation. In other types of hydrocephalus its efficacy is lower.