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What Is the Fossa of Rosenmuller?

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  • Written By: Andy Josiah
  • Edited By: Nancy Fann-Im
  • Last Modified Date: 31 March 2014
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The fossa of Rosenmuller, or Rosenmuller’s fossa, is a long, deep, shallow and narrow depression found in one of the furthest sections of the nasal cavity. It is actually better known as the pharyngeal recess due to its proximity to the pharynx, which is the section of the throat located between the mouth and nasal cavity. The fossa of Rosenmuller is also known as the lateral pharyngeal recess, Rosenmuller’s cavity or Rosenmuller’s recess.

Rosenmuller’s fossa is the ostium, or opening, of the auditory tube. Sometimes referred to as the pharyngotympanic tube, it is up to 1.38 inches long (35 millimeters) and is responsible for linking the pharynx with the middle ear. It is also called the Eustachian tube, after Eustachius, a 16th-century Italian pioneer in human anatomy.

The pharyngeal recess gets its name from Johann Christian Rosenmuller, a German anatomist who lived between 1771 and 1820. Rosenmuller first described the pharyngeal recess in 1808 while he was teaching anatomy and surgery to students at the University of Leipzig. Other anatomical terms are also named after Rosenmuller based on his research, including Rosenmuller’s gland, which is the eyelid portion of the almond-shaped gland in the eye known as the lacrimal gland; and Rosenmuller’s organ, which is an alternate term for an organ located next to the fallopian tube and ovary known as the parovarium or epoophoron.

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A lesser-known alternate term for the fossa of Rosenmuller is the fossa of Hercules or the Great Herculean Fossae. This was inspired by a physician who examined a young immigrant child at Ellis Island, which was a gateway for late-19th and early-20th century immigrants to the Unites States. Clearing a great amount of debris, mostly consisting of rotten feta cheese, from the boy’s fossae and noting his Greek heritage, the physician likened his treatment to the ninth task of Hercules. The assignment demanded that the Greek hero rescue a queen from the caves of Santorini.

This section of the nasal cavity has some considerable clinical significance. In medicine, it is linked to nasopharyngeal carcinoma. This is a cancer that affects the nasal cavity, pharynx and auditory tube. The exact site of occurrence is the retropharyngeal lymph node, or the node of Rouvier, which is a ball-shaped organ located at the base of the fossa of Rosenmuller.

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