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I watched mine perform a complicated skull-based surgery — the removal of a sphenoid meningioma.

The relevant areas are really tiny, right next to the sphenoid sinus and are prone to distortions and signal loss.

For example, the part of the sphenoid bone known as the Turkish saddle, becomes the edge of a sheer limestone cliff that we float over.

Some people feel the pain of sphenoid congestion at the back of their necks.

The cheer and following swell of voices resonated in her temples and the sphenoid deep behind her nose.