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Clinicopathologic study of solar dermatitis, a pinpoint papular variant of polymorphous light eruption in Taiwan, and review of the literature.
MedLine Citation:
PMID:  23473524     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
BACKGROUND/PURPOSE: A mild, micropapular eruption previously coined as "solar dermatitis" on the extensor of the forearm is a common form of photodermatitis in Taiwan. This study aimed to investigate the clinicopathologic findings of "solar dermatitis", the micropapular type of photodermatitis.
METHODS: We characterized the features of this photodermatitis by retrospectively reviewing and analyzing all such cases in a medical center in Southern Taiwan diagnosed during October 1988 to November 2010.
RESULTS: A total of 34 Taiwanese patients, all with Fitzpatrick skin type III-IV, were included (M:F = 1:1; mean age = 33.5 years; range = 9-62 years). Patients typically presented numerous, monomorphous, pinhead-sized micropapules on the extensor of the forearm after a recent, more intense sun exposure. The rash was often mildly pruritic and recurred in the summer, but usually resolved in a few days after sun protection and topical corticosteroid treatment. Reduced minimal erythema dose to UVB was noted in 2 of the 5 patients tested. Histopathologic examination (n = 10) revealed a mild spongiotic dermatitis.
CONCLUSION: The clinicopathologic findings of the "solar dermatitis" closely resembled those of the pinpoint papular variant of polymorphous light eruption (PP-PMLE) affecting African Americans and Asians in Singapore. PP-PMLE, micropapular light eruption in Japanese, summertime actinic lichenoid eruption in Indians and the present photodermatitis might represent a common, micropapular variant of PMLE affecting darker skin populations.
Authors:
Yi-An Chen; Julia Yu-Yun Lee
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Publication Detail:
Type:  Journal Article     Date:  2012-06-29
Journal Detail:
Title:  Journal of the Formosan Medical Association = Taiwan yi zhi     Volume:  112     ISSN:  0929-6646     ISO Abbreviation:  J. Formos. Med. Assoc.     Publication Date:  2013 Mar 
Date Detail:
Created Date:  2013-03-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9214933     Medline TA:  J Formos Med Assoc     Country:  China (Republic : 1949- )    
Other Details:
Languages:  eng     Pagination:  125-30     Citation Subset:  IM    
Copyright Information:
Copyright © 2012. Published by Elsevier B.V.
Affiliation:
Department of Dermatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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