Pus in the olfactory sulcus, on the upper surface of the middle turbinal posteriorly, and on the vault of the naso-pharynx, is suggestive of Sphenoidal suppuration.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
The operation for draining the Sphenoidal sinus is extended by removing the inner wall of the posterior ethmoidal cells.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
The Sphenoidal sinus near F opens into the upper meatus.
"Surgical Anatomy"
Joseph Maclise