Posteromedial (Kawase's) Triangle [Neurosurgery Wiki]

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.

=====Posteromedial (Kawase's) Triangle=====

: the line connecting the arcuate eminence
and the postero-medial corner of the geniculate ganglion – nerve V – the
line connecting the arcuate eminence and posterior aspect of nerve V where
it crosses the crest of the petrous apex.

The Kawase triangle is shown to be a safe anatomical landmark for [[anterior petrosectomy]]. 

Landmarks described by Borghei-Razavi  et al. avoid damage to the vital anatomical structures during access to the posterior fossa through middle fossa, despite temporal bone anatomical variations and different tumor sizes
((Borghei-Razavi H, Tomio R, Fereshtehnejad SM, Shibao S, Schick U, Toda M,
Kawase T, Yoshida K. Anterior petrosal approach: The safety of Kawase triangle as
an anatomical landmark for anterior petrosectomy in petroclival meningiomas. Clin
Neurol Neurosurg. 2015 Oct 28;139:282-287. doi: 10.1016/j.clineuro.2015.10.032.
[Epub ahead of print] PubMed PMID: 26552034.
))

This area is also known as The Rhomboid. 

Removal of the [[petrous bone]] within this triangle/quadrangle is an anterior [[petrosectomy]].

Borders:
Mandibular Nerve (V3)

[[greater superficial petrosal nerve]] (GSPN)

Arcuate Eminence

Superior Petrosal Sinus

-or-

GSPN

Arcuate Eminence

A line connecting the hiatus fallopii and [[Meckel's Cave]]

Contents:

Petrous Apex

IAC

Vertebrobasilar Junction