Pharyngeal Cavity

cavitas pharyngis

The pharyngeal cavity is the musculofascial tube extending from the skull base to the oesophageal inlet (C6 level), divided into three regions: nasopharynx (above the soft palate; receives Eustachian tubes and adenoids), oropharynx (between soft palate and epiglottis; bounded by tonsillar pillars, posterior pharyngeal wall, and soft palate), and hypopharynx (from epiglottis to cricopharyngeus; including the pyriform fossae and posterior pharyngeal wall).

Region: Neck

Clinical Relevance

Clinical Notes

The pharyngeal cavity is divided into these regions for tumour staging as the prognosis and treatment differ significantly between subsites. Nasopharyngeal carcinoma (NPC) arises in the fossa of Rosenmuller and presents with ipsilateral neck nodes, otitis media from Eustachian tube blockage, and CN VI palsy from skull base involvement. Oropharyngeal SCC is increasingly HPV-driven with a distinct biology and better prognosis. Hypopharyngeal SCC carries the worst prognosis due to late presentation and submucosal spread. Endoscopic assessment of all three regions is required for complete pharyngeal evaluation.

Pathology

Common Injuries & Conditions

Nasopharyngeal Carcinoma Staging in the Pharyngeal Cavity

Nasopharyngeal carcinoma in the fossa of Rosenmuller invades the nasopharyngeal wall and extends superiorly to the skull base (cavernous sinus, clivus) and laterally into the parapharyngeal space; endoscopic biopsy confirms the diagnosis and MRI stages the local extent for planning primary chemoradiotherapy with curative intent.