Congenital anomalies
First branchial cleft anomalies

Topic Completed: 1 October 2013

Revised: 04 January 2019

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PubMed Search: First branchial cleft anomalies

Nat Pernick, M.D.
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Table of Contents
Definition / general | Treatment
Cite this page: Pernick N. First branchial cleft anomalies. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/earfirstbranchialcleft.html. Accessed August 8th, 2020.
Definition / general
  • Cysts, sinuses, abscesses (Emerg Med J 2003;20:103) and fistulas near external ear; may be pre, post or infraauricular; also at angle of jaw, ear lobe, in external auditory canal or parotid gland
  • Fistulas may connect skin with external auditory canal
  • Includes duplication of external auditory canal (Int J Pediatr Otorhinolaryngol 2005;69:255)
  • 1 - 8% of branchial defects
  • Usually middle aged women
  • Classified by Work as Type I or II (Laryngoscope 1972;82:1581)
  • Type I: keratinizing squamous epithelium without adnexae (ectoderm only, duplicates membranous external auditory canal)
  • Type II: keratinized squamous epithelium with adnexa and cartilage (ectoderm and mesoderm, duplicates external auditory canal and pinna)
  • Excision; often recurs
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