Tentorial detachment technique in the combined petrosal approach for petroclival meningiomas.

Published

Journal Article

OBJECT: The combined petrosal approach is a suitable technique for the resection of medium-to-large petroclival meningiomas (PCMs). Multiple technical modifications have been reported to increase the surgical corridor, including the method of dural and tentorial opening. The authors describe their method of dural opening and tentorial resection, and detail the microanatomy related to their technique to clarify pitfalls and effects. METHODS: The relationship of temporal bridging veins and cranial nerves (CNs) around the tentorial resection area was examined during the combined petrosal approach in 20 cadaveric specimens. The authors also reviewed their 23 consecutive clinical cases treated using this technique between 2002 and 2010, focusing on the effects and risks of the procedure. RESULTS: In the authors' method, the tentorial resection extends from 5 to 10 mm anterior to the junction of the sigmoid sinus and the superior petrosal sinus ("sinodural point") to the trigeminal fibrous ring and the dural sleeve of CN IV. Temporal bridging veins enter the transverse sinus no more than 5 mm anterior to the sinodural point. The CN IV should be freed from its tentorial dural sleeve while avoiding disruption of the posterior cavernous sinus. The clinical data demonstrate a total resection rate of 78.3%, intraoperative estimated blood loss < 400 ml at a rate of 80.9%, and a venous congestion rate of 0%. CONCLUSIONS: Understanding the anatomical relationship between the tentorium and temporal bridging veins and CNs IV-VI allows neurosurgeons the ability to develop a combined petrosal approach to PCMs that will effectively supply a wide operative corridor after resecting the tentorium, while significantly devascularizing tumors.

Full Text

Duke Authors

Cited Authors

  • Kusumi, M; Fukushima, T; Mehta, AI; Aliabadi, H; Nonaka, Y; Friedman, AH; Fujii, K

Published Date

  • March 2012

Published In

Volume / Issue

  • 116 / 3

Start / End Page

  • 566 - 573

PubMed ID

  • 22196100

Pubmed Central ID

  • 22196100

Electronic International Standard Serial Number (EISSN)

  • 1933-0693

Digital Object Identifier (DOI)

  • 10.3171/2011.11.JNS11985

Language

  • eng

Conference Location

  • United States