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Citation:
Knipe H, Bell D, Preauricular sinus. Reference article, Radiopaedia.org (Accessed on 24 Apr 2024) https://doi.org/10.53347/rID-59643
Preauricular sinuses (also known as preauricular pits or preauricular cysts) are common congenital abnormalities that are typically small blind-ended openings near the ascending limb of the helix. These can be a simple pit or have a sinus tract and/or cystic component.
They are most common in East Asian populations with an incidence of 10% and less common in people of African descent (4%) and Caucasians (0.5%) 2.
Associations
They are often asymptomatic but patients may present if they become infected.
Preauricular sinuses are thought to be from faulty fusion of the six auditory hillocks of His in the sixth week of gestation. These hillocks are located on the borders of the first and second branchial arches, and branchial cleft anomalies can be related 3.
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1. Florian Lang. Encyclopedia of Molecular Mechanisms of Disease. (2009) ISBN: 9783540671367
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2. Yoo H, Park DH, Lee IJ, Park MC. A Surgical Technique for Congenital Preauricular Sinus. (2015) Archives of craniofacial surgery. 16 (2): 63-66. doi:10.7181/acfs.2015.16.2.63 - Pubmed
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3. Kavuturu V. S. Kumar Chowdary, Nelakurthi Sateesh Chandra, Ratnavelu Karthik Madesh. Preauricular Sinus: A Novel Approach. (2013) Indian Journal of Otolaryngology and Head & Neck Surgery. 65 (3): 234. doi:10.1007/s12070-012-0520-y - Pubmed
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4. Amer I, Falzon A, Choudhury N, Ghufoor K. Branchiootic syndrome--a clinical case report and review of the literature. (2012) Journal of pediatric surgery. 47 (8): 1604-6. doi:10.1016/j.jpedsurg.2012.05.016 - Pubmed
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