Unusual Clinical Presentation of Regression in a Congenital Melanocytic Nevus

Regression of congenital melanocytic nevi is usually accompanied by the halo phenomenon and is considered a rare event. OBJECTIVEA 15-year-old woman presented for the evaluation of multiple halo nevi. She had on her trunk a figure-of-eight pigmentary lesion, which had been developed after the coales...

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Published in:Dermatologic surgery 2005-04, Vol.31 (4), p.471-473
Main Authors: ARPAIA, NICOLA, CASSANO, NICOLETTA, FILOTICO, RAFFAELE, LARICCHIA, FRANCESCO, VENA, GINO ANTONIO
Format: Article
Language:English
Subjects:
Adolescent
Biological and medical sciences
Dermatology
Female
General aspects
Humans
Medical sciences
Nevus, Pigmented - congenital
Nevus, Pigmented - pathology
Nevus, Pigmented - surgery
Skin Neoplasms - congenital
Skin Neoplasms - pathology
Skin Neoplasms - surgery
Skin plastic surgery
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Tumors of the skin and soft tissue. Premalignant lesions
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Summary:Regression of congenital melanocytic nevi is usually accompanied by the halo phenomenon and is considered a rare event. OBJECTIVEA 15-year-old woman presented for the evaluation of multiple halo nevi. She had on her trunk a figure-of-eight pigmentary lesion, which had been developed after the coalescence of two distinct congenital melanocytic nevi. Close to the indentation between the two portions of the lesion, there was an achromic rounded area, extending from the perinevic skin to the nevus, causing its partial regression. METHODS AND MATERIALSDermoscopic examination disclosed a globular and homogeneous pattern, which was irregularly present at the edge of the achromic area. The histopathologic diagnosis was compound congenital melanocytic nevus with an eccentric area of regression. CONCLUSIONSIn our case, the presence of a regression area in the surrounding skin and the association with multiple halo nevi suggest a similarity with halo phenomenon, despite the atypical “halo,” which was discontinuous and eccentric.
ISSN:1076-0512
1524-4725
DOI:10.1097/00042728-200504000-00017