Tags: Disease.
A preauricular sinus or cyst (also known as a Congenital auricular fistula Congenital preauricular fistula Ear pit and Preauricular cyst) is a common congenital malformation characterized by a nodule dent or dimple located anywhere adjacent to the external ear. 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.
