By Gary M. White, MD

systematized nevus sebaceous

The systematized nevus sebaceous (SNS) is a very large nevus sebaceous that may be associated with various systemic abnormalities. It often follows Blaschko's lines.


The patient should be evaluated for abnormalities of the CNS, skeletal system, eyes. Appropriate studies beyond a good HP include skeletal survey, head CT or MRI, u.a., liver and renal studies, and calcium and phosphate.


The patient should be referred to a plastic surgeon for consideration of cosmetic repair. For any portions that cannot be excised, long term observation for development of BCCs and rarely other neoplasms is indicated.


JAAD July 2010 Volume 63, Issue 1, Pages 25–30


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