ALLERGIC CONTACT DERMATITIS AND ATOPIC DERMATITIS: HIGHLIGHTS OF THE OVERLAP SYNDROME
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Published:2024-05-08
Issue:3
Volume:
Page:6-12
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ISSN:2616-4868
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Container-title:Clinical and Preventive Medicine
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language:
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Short-container-title:Clin. and prev. med.
Author:
Konovalenko Liudmyla V.ORCID, Litus Oleksandr I.ORCID, Litus Viktor I.ORCID
Abstract
Introduction. The combination of atopic dermatitis (AD) with allergic contact dermatitis (ACD) or the occurrence of ACD on the background of atopic dermatitis is called the overlap syndrome. Studies have demonstrated several reasons why patients with AD have a similar or even increased risk of developing ACD compared to those without AD. Allergens and haptens are trigger factors in a group of patients with AD and ACD overlap syndrome.
The aim of the study. To confirm the diagnosis of ACD in a group of patients with AD – diagnose the overlap syndrome and analyze which allergens and haptens were the trigger factors in this group.
Materials and methods. To confirm IgE-dependent sensitization in atopic dermatitis, skin prick tests or determination of specific IgE in blood serum were performed. Skin patch tests (European series S-1000) were performed to determine the mechanisms of delayed-type hypersensitivity.
Results. It was found that the highest specific weight of positive allergic reactions has been recorded in response to the following allergens: ticks, ticks/ambrosia, birch and mold. The absolute majority of patients demonstrated positive specific IgE-dependent sensitization to Dermatophagoides pteronyssinus and Dermatophagoides farinae – 24 (50%), in turn, on Ambrósia – 14 (29.2%), and on Alternaria alternata – 8 (16.7%). Also, the reaction was most often recorded to haptens: cobalt, nickel, formaldehyde, PPD, textile dyes. Deterioration of the clinical course and shortening of AD remission periods were observed due to the formation of ACD against the background of impaired skin barrier function and the presence of chronic immune inflammation.
Conclusions. Patients with AD are more often diagnosed with ACD, which predictably worsens the course of AD. Patients with confirmed overlap syndrome "AD + ACD" most often show reactions to haptens: Cobalt, Nikel, Formaldehyde, PPD, Textile dye mix – and in the vast majority to 2 haptens or more in one patient.
Publisher
State Institution of Science Research and Practical Center
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