Congenital cartilaginous rest of the neck
Encyclopedia
Congenital cartilaginous rest of the neck (also known as a "Cervical accessory tragus," and "Wattle") is a cutaneous condition characterized by 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...

 remnants that are considered to be the cervical variant of accessory tragus
Accessory tragus
An accessory tragus, ear tag, preauricular appendage or preauricular tag is a relatively common congenital anomaly of the first branchial arch...

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