First branchial cleft anomalies
Reviewer: Nat Pernick, M.D. (see Reviewers page)
Revised: 22 October 2013, last major update December 2006
Copyright: (c) 2003-2013, PathologyOutlines.com, Inc.
- 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)
End of Ear > Congenital anomalies > First branchial cleft anomalies
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