Immunopathologic study of erythema dyschromicum perstans (ashy dermatosis)

Erythema dyschromicum perstans (EDP) is a pigmentary disease of unknown etiology in which damage to basal cells is thought to be mediated by adhesion molecules. The aim of this study was to characterize the histopathology and immunopathology of EDP. Forty‐three patients from Medellín, Colombia, with...

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Bibliographic Details
Published in:International journal of dermatology 2006-08, Vol.45 (8), p.937-941
Main Authors: Luz, A. Vásquez-Ochoa, Diana, M. Isaza-Guzmán, Orozco-Mora, Beatriz, Restrepo-Molina, Rodrigo, Trujillo-Perez, Judith, Félix, J. Tapia
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Basement Membrane - immunology
Basement Membrane - metabolism
Basement Membrane - pathology
Biological and medical sciences
Child
Colombia
Dermatology
Erythema - immunology
Erythema - metabolism
Erythema - pathology
Female
Humans
Male
Medical sciences
Middle Aged
Pigmentary diseases of the skin
Pigmentation Disorders - immunology
Pigmentation Disorders - metabolism
Pigmentation Disorders - pathology
Retrospective Studies
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Summary:Erythema dyschromicum perstans (EDP) is a pigmentary disease of unknown etiology in which damage to basal cells is thought to be mediated by adhesion molecules. The aim of this study was to characterize the histopathology and immunopathology of EDP. Forty‐three patients from Medellín, Colombia, with the diagnosis of EDP were evaluated. Skin biopsy specimens were obtained for histopathology and immunohistochemistry, using monoclonal antibodies directed against the following markers: CD4, CD8, CD56, CD1a, CD68, CLA, HLA–DR, ICAM‐1 and LFA‐1α. A dermal lymphocytic infiltrate was observed in all cases, with a perivascular location in 86%. Other histologic features included melanophages in all specimens, vacuolization of the basement membrane zone (BMZ) 58% and exocytosis of lymphocytes (53.5%). The mean number of total leukocytes was 1510 cells mm−2 of tissue. There was a predominance of CD8+ T lymphocytes in the dermis and HLA–DR+, ICAM‐1+ keratinocytes in the epidermis. Exocytosis of cutaneous lymphocyte antigen (CLA) + cells was observed in areas of BMZ damage, suggesting that response to antigenic stimulation may play a role in the development of EDP.
ISSN:0011-9059
1365-4632
DOI:10.1111/j.1365-4632.2006.02893.x