It is bounded medially by the aryepiglottic fold, and laterally by the thyroid cartilage and thyrohyoid membrane.

[3] The internal laryngeal nerve supplies sensation to the area, and it may become damaged if the mucous membrane is inadvertently punctured.

[4] This sinus is a common place for food particles to become trapped; if foreign material becomes lodged in the piriform fossa of an infant, it may be retrieved nonsurgically.

If the area is injured (e.g., by a fish bone), it can give the sensation of food stuck in the subject's throat.

[7] This article incorporates text in the public domain from page 1142 of the 20th edition of Gray's Anatomy (1918)