View of the depression at the level of the pyriform
The aciniform, flagelliform, and pyriform
glands are the smallest glands (Fig.
A congenital pyriform
fistula is unlikely in this patient due the age of onset and her predominantly right sided neck mass.
In adults, proposed routes of infection for AST include lymphatic or hematogenous spread, direct inoculation of the thyroid or surrounding anatomy, direct extension of an abscess, and spread through a pyriform
sinus fistula, usually in the setting of preexisting thyroid disease or an immunocompromised state [2, 11].
Though it was difficult to identify the opening of the pyriform
fossa under rigid laryngopharyngoscopy, the pyriform
sinus cyst and fistula could be visualized intraoperatively by open surgery.
Freeman, "Results of conservation surgery for cancers of the supraglottis and pyriform
sinus," The Laryngoscope, vol.
Caption: Figure 2: Preoperative 3-DCT view showing the missing body of the maxilla on the right side along with the lateral border of pyriform
aperture and medial infraorbital margin.
Is the pyriform
ligament important for alar width maintenance after Le Fort I osteotomy?
Horizontal supraglottic laryngectomy could be extended to the base of the tongue or to the pyriform
The elliptical section shape was the most common shape, accounting for 52.07% (151 of 290 laminas) of the specimens, followed by the pyriform
section shape (43.45%, 126 of 290 laminas).
These modifications have significantly decreased aspiration after therapy, reduced the pyriform
fossa residue, and so forth.
Laryngoscopic examination showed a large oval mass originating from the left pyriform
sinus and causing narrowing of both the hypopharynx and larynx.