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. .] and "nevus sebaceus of Jadassohn"
[Freedberg, et al. (2003). ''Fitzpatrick's Dermatology in General Medicine''. (6th ed.). McGraw-Hill. .]) is a congenital, hairless plaque that typically occurs on the face or scalp.
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]
Nevus sebaceous
, University of Wisconsin Hospitals and Clinics Authority, last updated 16 November 2007. The condition is named for an overgrowth of
sebaceous gland
A sebaceous gland is a microscopic exocrine gland in the skin that opens into a hair follicle to secrete an oily or waxy matter, called sebum, which lubricates the hair and skin of mammals. In humans, sebaceous glands occur in the greatest nu ...
s, a relatively uncommon
hamartoma
A hamartoma is a mostly benign, local malformation of cells that resembles a neoplasm of local tissue but is usually due to an overgrowth of multiple aberrant cells, with a basis in a systemic genetic condition, rather than a growth descended fr ...
, in the area of the nevus. NSJ is first described by Josef Jadassohn in 1895.
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.
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.
See also
*
Phakomatosis pigmentokeratotica
*
List of cutaneous conditions associated with increased risk of nonmelanoma skin cancer
References
External links
Epidermal nevi, neoplasms, and cysts
{{Epidermal-growth-stub