[Complicated retroauricular fistula with external ear major dysgenesis. A case report].

Branchial cleft anomalies are the second most common congenital head and neck lesions in children. The first congenital head and neck lesion is thyroglossal duct cysts. First branchial cleft anomalies are rare congenital head and neck malformations (8 % of branchial cleft anomalies). The initial clinical manifestation was recurrent infections and/ or discharge in auricular, periauricular, parotid or upper neck regions. These anomalies are extremely rare and other associated facial malformations were described. The computed tomography and magnetic resonance can help the diagnosis. The antibiotic treatment is indicated in acute infection. Also, incision and drainage are recommended in abscessed processes. In this report, we present a case of retroauricular sinus infection in a 6-year-old child with congenital ear anomalies.