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Nevus sebaceus in Adult
See also in: Hair and Scalp
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Nevus sebaceus in Adult

See also in: Hair and Scalp
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Contributors: Lauren Ko, Belinda Tan MD, PhD, Susan Burgin MD
Other Resources UpToDate PubMed

Synopsis

Nevus sebaceus (of Jadassohn) is a common form of epidermal nevus that is usually present at birth or develops in early childhood. Its presence may be subtle, and therefore it may not be noted until later childhood or adolescence, when it thickens due to hormonal influence. Nevus sebaceus presents as a yellow to orange oval or linear plaque, most often on the scalp and less frequently on the forehead or neck. Most lesions are sporadic. There is no predilection for either sex or any ethnicity.

Removal is recommended before adulthood due to the small risk of a malignancy developing within the lesion during adulthood. Traditionally, the risk of malignant transformation within lesions was approximated at 5%-15%, although this is now considered an overestimation. Other benign adnexal neoplasms, including trichoblastoma and syringocystadenoma papilliferum, occur more frequently. In rare cases, basal cell, squamous cell, sebaceous, or apocrine carcinomas can develop within a nevus sebaceous. For those who decline surgical excision, periodic skin examinations are advised.

In cases with a large plaque or multiple plaques, a diagnosis of nevus sebaceus syndrome may be considered. This condition may manifest with neurologic, ocular, and musculoskeletal abnormalities.

Codes

ICD10CM:
Q85.9 – Phakomatosis, unspecified

SNOMEDCT:
707136009 – Nevus sebaceous

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Last Reviewed: 05/25/2017
Last Updated: 06/21/2017
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Nevus sebaceus in Adult
See also in: Hair and Scalp
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Nevus sebaceus : Present at birth, Verrucous scaly plaque
Clinical image of Nevus sebaceus
A light brown and yellowish cobblestone plaque with a linear configuration on the lateral cheek.
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