The Inferolateral Surgical Triangle of the Cavernous Sinus: A Cadaveric and MRI Study with Neurosurgical Significance.
BACKGROUND
The inferolateral triangle is a surgical skull base triangle used as a neurosurgical landmark. There are few reports of its measurements with little attention paid to anatomic variations.


METHODS
The inferolateral triangle was measured in 10 adult human cadaveric heads via dissection then direct measurement and 5 participants undergoing neuroimaging using tracing features.


RESULTS
In the cadavers, mean lengths (mm) of the superior, anterior, and posterior borders were 17.0 (±5.5), 12.9 (±1.7), and 17.8 (±3.3), respectively, with mean area of 97.85 (±28.17) mm2. In the participants, mean lengths (mm) of the superior, anterior, and posterior borders were 17.35 (±4.01), 14.36 (±1.36), and 18.01 (±2.43), respectively, with mean area of 113.6 (±25.46) mm2. No statistical difference in triangle areas between groups was found.


CONCLUSIONS
Intimate understanding of the inferolateral triangle is essential to skull-based surgery; knowing its anatomy and variations aids in surgical planning and understanding of regional pathology.
['Kimball|Heather|H|', 'Kimball|David|D|', 'Blihar|David|D|', 'Zurada|Anna|A|', 'Tubbs|Richard Shane|RS|', 'Loukas|Marios|M|']
D059925:Anatomic Landmarks D002102:Cadaver D002426:Cavernous Sinus D006801:Humans D008279:Magnetic Resonance Imaging
Inferolateral triangle Skull base Anatomy Cadaver dissection Neurosurgery