Suprameatal triangle

Suprameatal Triangle

The Suprameatal Triangle (also known as the Triangular Fossa) is a region of the external ear. It is a significant anatomical landmark in otolaryngology, the branch of medicine that deals with conditions of the ear, nose, and throat (ENT).

Etymology

The term "Suprameatal Triangle" is derived from its location and shape. "Supra" is a Latin prefix meaning "above," "meatal" refers to the external auditory meatus (the opening of the ear), and "triangle" describes its three-sided shape.

Anatomy

The Suprameatal Triangle is located in the pinna, the visible part of the ear. It is bounded by the following structures:

• Anteriorly: The posterior root of the helix
• Posteriorly: The anterior wall of the concha
• Superiorly: The inferior crus of the antihelix

The floor of the Suprameatal Triangle is formed by the tympanic membrane and the external auditory canal. The triangle's apex points towards the external auditory meatus.

Clinical Significance

The Suprameatal Triangle is an important landmark in otolaryngology. It is used as a reference point in surgeries involving the ear, such as tympanoplasty (repair of the eardrum) and mastoidectomy (removal of diseased mastoid air cells). The Suprameatal Triangle is also used in the diagnosis of certain ear conditions, as changes in its appearance can indicate underlying pathology.

Related Terms

• Otolaryngology: The branch of medicine that deals with conditions of the ear, nose, and throat (ENT).
• Pinna (anatomy): The visible part of the ear.
• Tympanic membrane: The eardrum.
• External auditory meatus: The opening of the ear.
• Tympanoplasty: A surgical procedure to repair a perforated tympanic membrane (eardrum) or the small bones of the middle ear.
• Mastoidectomy: A surgical procedure to remove diseased mastoid air cells.

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