=====Petroclival tumor=====
Petroclival tumors remain a surgical challenge. Classically, the [[retrosigmoid approach]] (RSA) has long been used to reach such tumors, whereas the [[anterior petrosectomy]] (AP) has been proposed to avoid crossing [[cranial nerve]]s. The [[endoscopic endonasal approach]] has been "expanded" (i.e., EEEA) to the [[petroclival region]].

The EEEA should be preferred for extradural midline tumors ([[chordoma]]s, [[chondrosarcoma]]s) or for cystic lesions when drainage is essential. The AP could be optimal for the radical removal of intradural vascularized tumors (meningiomas) with intrapetrous or supratentorial extensions. The RSA retains an advantage for small or cystic tumors near the [[internal acoustic meatus]]. The skull base surgeon has to master all of these routes to choose the more appropriate one according to the surgical objective, the tumor characteristics, and the patient's medical status
((Jacquesson T, Berhouma M, Tringali S, Simon E, Jouanneau E. Which Routes for
Petroclival Tumors? A Comparison Between the Anterior Expanded Endoscopic
Endonasal Approach and Lateral or Posterior Routes. World Neurosurg. 2015
Jun;83(6):929-36. doi: 10.1016/j.wneu.2015.02.003. Epub 2015 Feb 17. PubMed PMID:
25700970.
)).

===== Petroclival meningioma =====


see [[Petroclival meningioma]]