This system enables approaching various skull base pathologies using a route that is much more direct and less damaging to brain structures. Our team uses this technique to treat hypophysis tumours, clivus tumours, craniopharyngiomas, anterior skull base tumours (i. e. central meningiomas of the olfactory sulcus), tumours of the cavernous sinus, etc. The use of lenses with various angles enables better visualisation of the peripheral structures of the lesion, a common location of lesional remains and, as a result, of relapse.

Over the last few years this technique has experienced enormous progress, new surgical instruments adapted to this technique, better optical units, have all made this technique the treatment of choice in pathologies such as hypophyseal tumours.