title: A Rare Colocalization of Lichen Planus and Vitiligo.
abstract: We report an unusual manifestation of vitiligo colocalizing with lichen planus (LP). A 76-year-old Greek male presented with a history of a red, scaly, itchy, asymmetrical patch located at the umbilicus within a well-demarcated depigmented macule of vitiligo. Histology showed features of a lichenoid interface dermatitis, favouring a diagnosis of LP. Colocalization of LP and vitiligo has rarely been reported in the literature. After reviewing the literature, we believe that at present there is insufficient evidence to resolve the uncertainties in the aetiology of this colocalization. It seems to us that the association between LP and vitiligo is more than coincidental, but none of the theories discussed in this paper can sufficiently account for it. Rather, the association is likely to be multifactorial in its pathogenesis.
authors.affiliation: Department of Dermatology, University College London Hospitals, London NW1 2BU, UK.
authors.forename: David
authors.initials: D
authors.lastname: Veitch
authors.affiliation: Department of Dermatology, University College London Hospitals, London NW1 2BU, UK.
authors.forename: Georgios
authors.initials: G
authors.lastname: Kravvas
authors.affiliation: Department of Histopathology, University College London Hospitals, London NW1 2BU, UK.
authors.forename: Sian
authors.initials: S
authors.lastname: Hughes
authors.affiliation: Department of Dermatology, University College London Hospitals, London NW1 2BU, UK.
authors.forename: Christopher
authors.initials: C
authors.lastname: Bunker