A small bursa between the posterior surface of the cricoid cartilage and the anterior surface of the oesophagus or prevertebral fascia, reducing friction during laryngeal elevation and depression with swallowing.
Posterior cricoid bursitis contributes to dysphagia and posterior laryngeal pain in patients with chronic acid reflux (posterior laryngitis) and in professional voice users with hyperpharyngeal tension. It is in the region of the cricopharyngeal muscle and may be associated with Zenker's diverticulum development above the cricopharyngeus. Posterior cricoid carcinoma arises from adjacent mucosa.
Bursal inflammation at the posterior cricoid from chronic laryngopharyngeal reflux or vocal overuse producing posterior throat discomfort worsening with swallowing and voice use.
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