Male Anatomy of the Piriform Sinus
This exhibit illustrates the sagittal and opens posterior anatomy of the piriform sinus. The piriform sinuses are recesses located on either side of the laryngeal orifice in the hypopharynx. The recurrent, superior, and internal laryngeal nerves lie beneath the mucosa of the sinuses. Surrounding structures include the epiglottis, aryepiglottic folds, tonsils, esophagus, and arytenoid cartilages.