* Not a rare disease
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 The defect may occur randomly (sporadically) during the development of an embryo or it may be inherited in an autosomal dominant manner with reduced penetrance. Bilateral cases are more likely to be hereditary. Treatment may involve antibiotics for infections and/or surgery to remove the defect.A preauricular sinus is a common birth defect that may be seen during a routine exam of a newborn. It may appear as a tiny skin-lined hole or pit, often just in front of the upper ear where the cartilage of the ear rim meets the face. It may occur on one side (unilateral) or both sides (bilateral). It usually does not cause symptoms unless it becomes infected.
Last updated: 5/21/2014
- Fistulas and sinuses of the neck and face. DermNet NZ. December 29, 2013; http://dermnetnz.org/site-age-specific/facial-sinuses.html. Accessed 5/21/2014.
- Noah S Scheinfeld. Preauricular sinuses. Medscape Reference. February 6, 2014; http://emedicine.medscape.com/article/1118768-overview. Accessed 5/21/2014.
- DermNet NZ is an online resource about skin diseases developed by the New Zealand Dermatological Society Incorporated. DermNet NZ provides information about this condition.
- Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
- Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine.
- PubMed is a searchable database of medical literature and lists journal articles that discuss Preauricular sinus. Click on the link to view a sample search on this topic.