title: Lentigines within nevus depigmentosus: a rare collateral effect of UVB therapy?
abstract: Nevus depigmentosus is an uncommon hypopigmented macule or patch that is congenital and stable in its relative size and distribution throughout life; it occurs sporadically and may be localized, segmental or, less often, systematized. We report the case of a 17-year-old girl with a segmental achromic nevus of the left leg and a patch on the lower back with late age of onset who developed lentigines after prolonged intense ultraviolet B exposure as a consequence of an incorrect diagnosis of segmental vitiligo.
authors.affiliation: Department of Clinical and Experimental Medicine, Division of Dermatology (C. Varotti), University of Bologna, Bologna, Italy. fbardazzi@aosp.bo.it
authors.forename: Federico
authors.initials: F
authors.lastname: Bardazzi
authors.forename: Riccardo
authors.initials: R
authors.lastname: Balestri
authors.forename: Angela
authors.initials: A
authors.lastname: Antonucci
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Spadola
mesh_terms: D000293:Adolescent; D003937:Diagnosis, Differential; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D007911:Lentigo / Q000209:etiology*; D009506:Nevus / Q000150:complications / Q000175:diagnosis* / Q000532:radiotherapy; D014467:Ultraviolet Therapy / Q000009:adverse effects*; D014820:Vitiligo / Q000175:diagnosis* / Q000532:radiotherapy*