Nevus sebaceous

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Nevus sebaceus or sebaceous nevus (the first term is its Latin name, the second term is its name in English; also known as an "organoid nevus"James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology. (10th ed.). Saunders. {{ISBN|0-7216-2921-0}}.{{rp|661}} and "nevus sebaceus of Jadassohn"Freedberg, et al. (2003). Fitzpatrick's Dermatology in General Medicine. (6th ed.). McGraw-Hill. {{ISBN|0-07-138076-0}}.{{rp|773}}) is a congenital, hairless plaque that typically occurs on the face or scalp.{{Cite journal|vauthors=Kovich O, Hale E |title=Nevus sebaceus |journal=Dermatology Online Journal |volume=11 |issue=4 |pages=16 |year=2005 |url=http://dermatology.cdlib.org/114/NYU/NYUtexts/1012044.html |pmid=16403388}} Such nevi are classified as epidermal nevi and can be present at birth, or early childhood, and affect males and females of all races equally.Teng, Joyce M.C. [http://www.uwhealth.org/healthfacts/B_EXTRANET_HEALTH_INFORMATION-FlexMember-Show_Public_HFFY_1126652453178.html Nevus sebaceous] {{Webarchive|url=https://web.archive.org/web/20090530133258/http://www.uwhealth.org/healthfacts/B_EXTRANET_HEALTH_INFORMATION-FlexMember-Show_Public_HFFY_1126652453178.html |date=30 May 2009 }}, University of Wisconsin Hospitals and Clinics Authority, last updated 16 November 2007. The condition is named for an overgrowth of sebaceous glands, a relatively uncommon hamartoma, in the area of the nevus. NSJ is first described by Josef Jadassohn in 1895.{{Cite journal|last=Kelati|first=Awatef|last2=Baybay|first2=Hanane|last3=Gallouj|first3=Salim|last4=Mernissi|first4=Fatima Zahra|date=2017|title=Dermoscopic Analysis of Nevus Sebaceus of Jadassohn: A Study of 13 Cases|url=https://www.karger.com/Article/FullText/460258|journal=Skin Appendage Disorders|language=english|volume=3|issue=2|pages=83–91|doi=10.1159/000460258|issn=2296-9195|pmid=28560218|pmc=5436057}}

Skin growths such as benign tumors and basal cell carcinoma can arise in sebaceous nevi, usually after puberty. Rarely, sebaceous nevi can give rise to sebaceous carcinoma.{{Cite journal |vauthors=Izumi M, Tang X, Chiu CS, etal |title=Ten cases of sebaceous carcinoma arising in nevus sebaceus |journal=J. Dermatol. |volume=35 |issue=11 |pages=704–11 |date=November 2008 |pmid=19120764 |doi=10.1111/j.1346-8138.2008.00550.x}} However, the rate of such malignancies is now known to be less than had been estimated. For this reason, excision is no longer automatically recommended.{{Cite journal|doi=10.1097/00001665-200309000-00010 |vauthors=Santibanez-Gallerani A, Marshall D, Duarte AM, Melnick SJ, Thaller S |title=Should nevus sebaceus of Jadassohn in children be excised? A study of 757 cases, and literature review |journal=J. Craniofac. Surg. |volume=14 |issue=5 |date=September 2003 |pmid=14501324 |pages=658–60 }}