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Physical urticaria: prevalence, type and natural course in a tropical country.
MedLine Citation:
PMID:  21175877     Owner:  NLM     Status:  Publisher    
Background  Physical urticarias (PU) are an urticarial response to different specific physical stimuli. PU can occur concurrently with chronic spontaneous urticaria or another type of PU. Objective  We aimed to study the prevalence, type, clinical data and natural course of each type of PU and other inducible urticarias and also the prognostic factors for remission of patients visiting a tertiary referral hospital. Method  We performed a retrospective study of 1200 chronic urticaria patients who visited our Urticaria Clinic during a period of 5 years. Results  Of the 1200 chronic urticaria patients, 86 (7.2%) were diagnosed as PU and other inducible urticarias. The most common type of PU was symptomatic dermographism (n = 35, 40.7%) followed by cold urticaria (n = 20, 23.3%) and delayed pressure urticaria (n = 11, 12.8%), respectively. Twelve patients (13.9%) had associated chronic spontaneous urticaria. None of the cases had multiple types of PU. Erythrocyte sedimentary rate elevation was the most common abnormal laboratory result. Nevertheless, only 4.6% declared a related infection. For each type, the median time after onset before 50% remission showed that cholinergic urticaria took the shortest course (34 months) and delayed pressure urticaria took the longest period (110 months). After 1 year and 5 years from the onset of symptoms, 13% and 50% of PU patients were free of symptoms, respectively. Conclusion  This study emphasized the variety of PU, other inducible urticarias and natural courses based on tertiary hospital care. PU and other inducible urticarias have tendency to have a longer course than chronic spontaneous urticaria.
N Silpa-Archa; K Kulthanan; S Pinkaew
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2010-12-22
Journal Detail:
Title:  Journal of the European Academy of Dermatology and Venereology : JEADV     Volume:  -     ISSN:  1468-3083     ISO Abbreviation:  -     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9216037     Medline TA:  J Eur Acad Dermatol Venereol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2010 The Authors. Journal of the European Academy of Dermatology and Venereology © 2010 European Academy of Dermatology and Venereology.
Department of Dermatology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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