Document Detail


Clinical and histopathologic characteristics of trichrome vitiligo.
MedLine Citation:
PMID:  10727303     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: The term trichrome vitiligo describes lesions that have a tan zone of varying width between normal and totally depigmented skin, which exhibits an intermediate hue. However, the pathogenesis and the histopathologic characteristics of trichrome vitiligo are unknown. OBJECTIVE: Our purpose was to investigate the clinical and histopathologic characteristics and the pathogenesis of trichrome vitiligo. METHODS: Four punch biopsy specimens were taken from 21 patients with trichrome vitiligo; they were from vitiliginous skin, light brown skin, perilesional normal skin, and normal skin as far as 5 cm from the nearest vitiligo spot. The sections were stained with hematoxylin-eosin; in selected cases, we performed immunohistochemical staining with S-100 protein and CD1a. RESULTS: Trichrome vitiligo occurred most frequently on the trunk in active vitiligo vulgaris. Focal vacuolar degeneration of the basal cell layer and mild inflammatory cell infiltration of the epidermis and dermis were more prominent in light brown skin and perilesional normal skin than in vitiliginous skin and normal skin. The number of melanocytes was decreased in light brown skin compared with perilesional normal skin (P <.05) and in vitiliginous skin compared with light brown skin (P <.05); a few melanocytes were observed even in skin affected by trichrome vitiligo. The number of Langerhans cells was increased in the epidermis of light brown skin and perilesional normal skin compared with vitiliginous and normal skin (P <.05). PUVA therapy yielded excellent repigmentation. CONCLUSION: Trichrome vitiligo is a variant of active vitiligo. The changes of melanocytes, keratinocytes, and Langerhans cells may be involved in the pathogenesis of depigmentation in trichrome vitiligo.
Authors:
S K Hann; Y S Kim; J H Yoo; Y S Chun
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the American Academy of Dermatology     Volume:  42     ISSN:  0190-9622     ISO Abbreviation:  J. Am. Acad. Dermatol.     Publication Date:  2000 Apr 
Date Detail:
Created Date:  2000-05-02     Completed Date:  2000-05-02     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7907132     Medline TA:  J Am Acad Dermatol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  589-96     Citation Subset:  IM    
Affiliation:
Department of Dermatology, Yonsei University College of Medicine, and the Pochon CHA Medical College, Pundang CHA Hospital. skhann@hitel.net
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MeSH Terms
Descriptor/Qualifier:
Adult
Biopsy
Female
Humans
Male
PUVA Therapy
Skin / pathology*
Skin Pigmentation
Vitiligo / diagnosis*,  drug therapy,  pathology

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