Congenital preauricular fistula

Preauricular sinus and cyst
Classification and external resources
10 9 DiseasesDB MedlinePlus 003304

A preauricular sinus or cyst (also known as a "Congenital auricular fistula," "Congenital preauricular fistula," "Ear pit"[1]:782, and "Preauricular cyst"[2] ) is a common congenital malformation characterized by a nodule, dent or dimple located anywhere adjacent to the external ear.[3] They are inherited features and usually appear on one side, but may be bilateral in 25-50% of cases. Preauricular sinuses and cysts result from developmental defects of the first and second branchial arches.[4] Occasionally a preauricular sinus or a cyst can become infected.[5] This and other congenital ear malformations are associated with renal anomalies.[6]

Most preauricular sinuses are asymptomatic and remain untreated unless they become infected too often.[7] Preauricular cysts are treated with surgery which, because of their close proximity to the facial nerve should be left to an experienced surgeon, such as an otolaryngologist - head and neck surgeon.[8]

In rare cases they may be associated with branchio-oto-renal syndrome.

See also


External links

  • The preauricular sinus: A review of its aetiology, clinical presentation and management International Journal of Pediatric Otorhinolaryngology (2005) 69, 1469—1474

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