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  2. Preauricular sinus and cyst - Wikipedia

    en.wikipedia.org/wiki/Preauricular_sinus_and_cyst

    The difference between them is that a cyst does not connect with the skin, but a sinus does. [3] Frequency of preauricular sinus differs depending the population: 0.1–0.9% in the US, 0.9% in the UK, and 4–10% in Asia and parts of Africa. [4] Preauricular sinuses are inherited features, and frequently appear next to both ears. [5]

  3. Why some people have a small hole in front of their upper ears

    www.aol.com/lifestyle/2016-11-29-why-some-people...

    It is called preauricular sinus which, according to the U.S. National Institutes of Health, or NIH, "generally appears as a tiny skin-lined hole or pit, often just in front of the upper ear where ...

  4. Accessory auricle - Wikipedia

    en.wikipedia.org/wiki/Accessory_auricle

    The several components or degrees of development range from an ear tag, preauricular appendage, preauricular tag, or accessory tragus, to supernumerary ears or polyotia. [7] It is a relatively common congenital anomaly of the first branchial arch or second branchial arches.

  5. Category:Congenital disorders of ears - Wikipedia

    en.wikipedia.org/wiki/Category:Congenital...

    Preauricular sinus and cyst This page was last edited on 1 April 2018, at 20:24 (UTC). Text is ... About Wikipedia; Disclaimers; Contact Wikipedia; Code of Conduct;

  6. Auricle (anatomy) - Wikipedia

    en.wikipedia.org/wiki/Auricle_(anatomy)

    These hillocks develop into the folds of the auricle and gradually shift upwards and backwards to their final position on the head. En route accessory auricles (also known as preauricular tags) may be left behind. The first three hillocks are derived from the 1st branchial arch and form the tragus, crus of the helix, and helix, respectively.

  7. Preauricular deep parotid lymph nodes - Wikipedia

    en.wikipedia.org/wiki/Preauricular_deep_parotid...

    The preauricular deep parotid lymph nodes (anterior auricular glands or preauricular glands), from one to three in number, lie immediately in front of the tragus.. Their afferents drain multiple surfaces, most of which are lateral in origin.

  8. List of ICD-9 codes 740–759: congenital anomalies - Wikipedia

    en.wikipedia.org/wiki/List_of_ICD-9_codes_740...

    The full chapter can be found on pages 417 to 437 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1. Both volumes can be downloaded for free from the website of the World Health Organization.

  9. Branchial cleft cyst - Wikipedia

    en.wikipedia.org/wiki/Branchial_cleft_cyst

    The cyst wall is composed of squamous epithelium (90%), columnar cells with or without cilia, or a mixture of both, with lymphoid infiltrate, often with prominent germinal centers and few subcapsular lymph sinuses. The cyst is typically surrounded by lymphoid tissue that has attenuated or absent overlying epithelium due to inflammatory changes.