Pyriform sinus

What is Pyriform sinus?

Pyriform sinus meaning Extends from the pharyngoepiglottic fold to the upper end of the esophagus. It is bounded laterally by the thyroid cartilage and medially by the hypopharyngeal surface of the aryepiglottic fold (C131) and the arytenoid and cricoid cartilages.


reference: national Cancer Institute – Glossary for Registrars

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