Sphenochoanal polyps are rare, benign, solitary masses that arise from the sphenoid sinus, exit through the sphenoid ostium, pass across the sphenoethmoid recess
, and extend into the choana.
Instead, it was attached to the cribriform plate and the sphenoethmoid recess
by a stalk.
Collectively, these structures form what is known as the sphenoethmoid recess
, which serves as a common drainage pathway for the posterior ethmoid and sphenoid sinuses.
Anterior rhinoscopy does not allow for visualization of the sphenoethmoid recess
, but nasal endoscopy provides a clear view of the sphenoethmoid recess
and the postnasal space.
The pedicle of the sphenochoanal polyp was seen protruding through the left sphenoid ostium into the sphenoethmoid recess
and extending into the choana.
1) One sample was obtained from the mucosa of the sphenoethmoid recess
before the sinus was entered, and the second was taken from the mucosal lining of the sinus itself.
Swab specimens of the middle meatus and sphenoethmoid recess
were aseptically obtained endoscopically and cultured for aerobes.
The sphenoid sinus ostium is usually located in the sphenoethmoid recess
between the superior turbinate and the nasal septum.
On the medial side of the inferior insertion of the supreme turbinate, a slit-like ostium of the sphenoid sinus in the right sphenoethmoid recess
Polyps arise in various parts of the nasal cavity, including the uncinate process, the ethmoid infundibulum, the ethmoid bulla, the frontal recess, the sphenoethmoid recess
, the superior meatus, the middle turbinate, and the superior meatus.
Septoplasty with an endoscopic excision of the high septal ridge and the sphenoethmoid recess
polyps alleviated the patient's nasal obstruction, headaches, and smell disturbance.
Coronal sinus computed tomography (CT) demonstrated a polypoid mass originating in the left sphenoid sinus and extending down to the nasopharynx through the area of the sphenoethmoid recess
(figure, A and B).