Morphology and Clinical Presentation of Duplicate External Auditory Canal-Literature Review

Abstract

First branchial cleft anomalies (FBCA) such as duplication of the external auditory canal are due to failure to obliterate the ventral portion of the 1st cleft while external auditory canal stenosis and atresia are abnormalities of the dorsal portion.The annual incidence is 1:1000,000 and it’s been found to be commoner among females 69% than males 31% with the left ear most affected.FBCA can present as fistula, sinus or cysts located around/along the EAC, periauricular region and the neck above the hyoid bone.

Keywords: Duplicate External auditory canal,First branchial anomaly,auditory canal stenosis

DOI: 10.7176/JHMN/64-04

Publication date:July 31^st 2019