Preauricular sinus and cyst

Common card · No. 270973

Preauricular sinuses, also known as preauricular pits and preauricular cysts, are common malformations present at birth that involve the external ear. A cyst does not connect with the skin, while a sinus does. Both ears are often affected. They may be associated with other defects such as branchio-oto-renal syndrome. They are often inherited from a persons parents. They affect about 0.1–0.9% of people in the US, 0.9% in the UK, and 4–10% in Asia and parts of Africa.

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