· Borders: 1. Optic Nerve
· Contents: 1. Anterior Clinoid Process
2. Clinoidal ICA
The clinoidal triangle can be exposed via the endoscopic supraorbital extradural approach. Following a supraorbital craniotomy and the drilling of the sphenoidal ridge, the orbital roof and the greater and lesser sphenoid wings, the floor of the middle cranial fossa can be exposed by lifting the temporal dura slightly. At this point, the anterior clinoid process can be removed to allow the clinoidal triangle to be visualized 1).
1)
Komatsu F, Komatsu M, Inoue T, Tschabitscher M. Endoscopic supraorbital extradural approach to the cavernous sinus: a cadaver study. J Neurosurg. 2011 May;114(5):1331-7. doi: 10.3171/2010.10.JNS101242. Epub 2010 Dec 10. PMID: 21142751.