The Auricle is liable to various congenital malformations, ranging from almost entire absence to simple alterations in the usual outline. Supernumerary organs, generally rudimentary, are also met with. Inflammations of the skin, such as erysipelas and inflammatory skin eruptions, especially eczema, may extend to the auricle.

A more independent affection is the Haematoma of the auricle or Othematoma. This consists in a haemorrhage between the cartilage of the auricle and the perichondrium, the latter being raised, but generally carrying with it pieces of cartilage. It usually arises from injury, but in some cases the injury is slight or absent, and the condition is spontaneous. This condition is so frequent in insane persons, more particularly in dementia paralytica, that the name Insane ear is often used. The concavities of the auricle arc tilled out with the effused blood, which generally remains fluid for a considerable time. With the absorption of the blood there is generally marked shrinking and cicatricial contortion of the auricle. Sometimes injuries induce a serous exudation instead of blood, the condition otherwise resembling haematoma.

Small Fibromas sometimes form in the auricle in consequence of the irritation of earrings. Gouty tophi sometimes occur in the cartilage of the auricle.

Epithelioma is not infrequent in the auricle. It occurs both in the form of flat-celled epithelioma and of rodent ulcer. The tumour which sometimes develops on a pre-existing eczema is liable to extend to the external meatus.