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The presigmoid retrolabyrinthine approach: Technical note.

L Troude¹, G Baucher¹, J-P Lavieille¹

¹Department of Neurosurgery, North University Hospital, APHM-AMU, Chemin des Bourrely, 13015 Marseille, France.

Neuro-Chirurgie

|January 25, 2021

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The retrolabyrinthine approach, a posterior petroscectomy, expands mastoidectomy for posterior cerebellopontine angle access. It is a demanding technique often combined with petrous bone resections for broader surgical targets.

Area of Science:

Neurosurgery
Otolaryngology

Background:

The retrolabyrinthine approach is a type of posterior petroscectomy.
It aims to enlarge the mastoidectomy while preserving critical intrapetrous neurotologic structures.

Purpose of the Study:

To present the technique, indications, and limitations of the retrolabyrinthine approach.
To highlight its role in achieving maximal exposure of the posterior cerebellopontine angle.

Main Methods:

Skeletonization of the sigmoid sinus.
Wide opening of the mastoid antrum.
Exposure of the semicircular canals.

Main Results:

The retrolabyrinthine approach provides enlarged mastoidectomy for posterior cerebellopontine angle access.

Keywords:

Cerebellopontine angle Petrous bone Presigmoid approach SemiciRcular canals Sinodural angle (Citelli's angle)Skull base surgery

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It requires careful preservation of intrapetrous neurotologic structures.

Conclusions:

The retrolabyrinthine approach is a technically demanding neurosurgical procedure.
It is frequently combined with petrous bone resections for extended surgical indications, such as targeting the jugular foramen or petroclival area.