Pharyngeal recess
Encyclopedia
Behind the ostium
Ostium
Ostium may refer to:Anatomy*Ostium of Fallopian tube*Ostium primum or foramen ovale of the developing heart*Ostium maxillare of the maxillary sinus*Ostium of female lepidoptera genitalia...

 of the eustacian tube is a deep recess, the pharyngeal recess (fossa of Rosenmüller).

Clinical significance

At the base of this recess is the retropharyngeal lymph node (the Node of Rouvier.) This is clinically significant in that it may be involved in certain head and neck cancer
Cancer
Cancer , known medically as a malignant neoplasm, is a large group of different diseases, all involving unregulated cell growth. In cancer, cells divide and grow uncontrollably, forming malignant tumors, and invade nearby parts of the body. The cancer may also spread to more distant parts of the...

s, notably Nasopharyngeal cancer.
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