Premium
Halo congenital naevus in a middle‐aged patient with vitiligo
Author(s) -
Leow Liang Joo,
Goh Boon Kee
Publication year - 2008
Publication title -
australasian journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.67
H-Index - 53
eISSN - 1440-0960
pISSN - 0004-8380
DOI - 10.1111/j.1440-0960.2008.00483.x
Subject(s) - depigmentation , vitiligo , dermis , reticular dermis , medicine , melanocyte , pathology , dermatology , malignancy , papillary dermis , congenital melanocytic nevus , hypopigmentation , nevus , pigmentation disorder , epidermis (zoology) , anatomy , melanoma , cancer research
SUMMARY A case of halo congenital naevus is reported on the chest of a 56‐year‐old Asian woman with pre‐existing vitiligo. The naevus measured 3.5 cm × 2 cm and underwent depigmentation around its periphery. Dermoscopic examination showed coarse pigment in the darker centre of the naevus and depigmentation in the surrounding halo. Light microscopy showed well‐formed naevus cell nests with coarse melanin granules in the papillary dermis, and surrounding fibrosis. Melanocytes extended into reticular dermis, consistent with a congenital growth pattern. There was no evidence of malignancy. The epidermis was of normal appearance. S100 staining highlighted melanocytes in the dermis. Basal melanocytes were retained at the periphery of the naevus. Based on the clinical history and histological findings, a diagnosis of halo congenital naevus was made. The naevus was not excised.