What is pyriform fossae?

The pyriform fossae are two small, pear-shaped depressions located in the wall of the pharynx. They are located on either side of the larynx and are lined with stratified squamous epithelium. The fossae are involved in swallowing, as they allow food and liquid to pass between the oral cavity and the esophagus. They are also involved in voice production and play a role in resonance and articulation. The pyriform fossae can become inflamed or infected, leading to a condition called pyriform sinusitis. This can cause difficulty swallowing, pain, and a feeling of a lump in the throat. Treatment typically involves antibiotics and managing symptoms. In rare cases, surgery may be necessary to drain any abscesses that have formed.