Accessory tragus
Encyclopedia
An accessory tragus, ear tag, preauricular appendage or preauricular tag is a relatively common congenital anomaly
of the first branchial arch
. It takes the form of a skin tag just in front of the ear, and is found in approximately 3-6 per 1000 live births.
Congenital abnormality
A congenital anomaly is a condition which is present at the time of birth which varies from the standard presentation....
of the first branchial arch
Branchial arch
In the development of vertebrate animals, the pharyngeal arches are anlage for a multitude of structures. In humans, they develop during the fourth week in utero as a series of mesodermal outpouchings on the left and right sides of the developing pharynx...
. It takes the form of a skin tag just in front of the ear, and is found in approximately 3-6 per 1000 live births.
See also
- Congenital cartilaginous rest of the neckCongenital cartilaginous rest of the neckCongenital cartilaginous rest of the neck is a cutaneous condition characterized by branchial arch remnants that are considered to be the cervical variant of accessory tragus....
- List of cutaneous conditions
- Mucous membraneMucous membraneThe mucous membranes are linings of mostly endodermal origin, covered in epithelium, which are involved in absorption and secretion. They line cavities that are exposed to the external environment and internal organs...
- Wildervanck syndromeWildervanck syndromeWildervanck syndrome is a developmental disorder that may be characterized by accessory tragi.- See also :* WHIM syndrome* List of cutaneous conditions* Xanthelasmoidal mastocytosis...