Advanced Cranial Approaches

Retrolabyrinthine approach

01. Mastoidectomy staged approach (bone anatomy)
The bony landmarks for mastoidectomy and retrolabyrinthine approach are presented.
02. Antrum, sigmoid/transverse sinus
The cortical mastoidectomy was done exposing the sigmoid and transverse sinuses. The antrum is revealed. The tegmen tympany as well as the retrosigmoid dura is exposed. The superior petrosal sinus and presigmoid dura are visible.
03. Labyrinth and facial nerve (retrolab approach)
The labyrinth and the facial nerve in the falopian canal were exposed. The presigmoid dura, endolymphatic sac as well as the jugular bulb are presented. The incus is visible.