Abstract:
OBJECTIVE: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 nerves. More recently, the endoscopic endonasal approach has been "expanded" (i.e., EEEA) to the petroclival region. We aimed to compare these 3 approaches to help in the surgical management of petroclival tumors. METHODS:Petroclival approaches were performed on 5 specimens after they were prepared with formaldehyde colored via latex injection. RESULTS:The EEEA provides a simple straightforward route to the clivus, but reaching the petrous apex requires the surgeon to circumvent the internal carotid artery either via a medial transclival, an inferior transpterygoid, or a lateral variant through the Meckel's cave. In contrast, the AP offers a narrow direct superolateral access to the petroclival region crossed by the trigeminal nerve. Finally, the RSA provides a wide simple and quick exposure of the cerebellopontine angle, but access to the petroclival region needs the surgeon to deal with the V(th) to XI(th) cranial nerves. DISCUSSION/CONCLUSION:The EEEA should be preferred for extradural midline tumors (chordomas, chondrosarcomas) 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.
journal_name
World Neurosurgjournal_title
World neurosurgeryauthors
Jacquesson T,Berhouma M,Tringali S,Simon E,Jouanneau Edoi
10.1016/j.wneu.2015.02.003subject
Has Abstractpub_date
2015-06-01 00:00:00pages
929-36issue
6eissn
1878-8750issn
1878-8769pii
S1878-8750(15)00080-7journal_volume
83pub_type
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