Preauricular sinus and cyst
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Preauricular sinuses and preauricular cysts are two common congenital malformations. Each involves the external ear. The difference between them is that a cyst does not connect with the skin, but a sinus does. [3] Frequency of preauricular sinus differs depending the population: 0.1–0.9% in the US, 0.9% in the UK, and 4–10% in Asia and parts of Africa.[4]
Quick Facts Other names, Specialty ...
Preauricular sinus and cyst | |
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Other names | Congenital auricular fistula, Congenital preauricular fistula, Ear pit,[1]: 782 or a Preauricular cyst[2] |
Preauricular sinus on right ear | |
Specialty | Otorhinolaryngology |
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Preauricular sinuses are inherited features, and frequently appear next to both ears.[5] Preauricular sinuses can be associated with other defects that are not visible, one example being branchio-oto-renal syndrome.[6]