Photoaggravation in cases of sensitization to methylchloroisothiazolinone (MCI)/methylisothiazolinone (MI) has been reported previously (, ). Here, we describe 10 patients, 7 from Belgium and 3 from France, suffering from photoaggravated dermatitis, in some cases followed by transient photosensitivity, after sensitization to these biocides.Patients and MethodsTen patients, 5 men and 5 women, with a median age of 49.5 years, were investigated in Bordeaux, Marseille, and Toulouse (1 patient each; patients 1–3), in Antwerp (n = 4; patients 4–6 and patient 10) and in Leuven (n = 3; patients 7–9) between January 2012 and February 2017. All had presented with skin lesions in a photodistributed pattern, or showed more pronounced lesions on ultraviolet (UV)‐exposed skin regions, often involving the face and/or the back of the hands. Seven of them, upon referral to the patch test clinic, gave a clear history of consistent photoaggravation whenever their dermatitis was exposed to sunlight. In others (e.g. patient 2) the relative photodistribution of the skin lesions became apparent only during further follow‐up, when UV‐exposed skin became more prominently affected. For patients 7 and 9, no information had been documented regarding subjective symptoms upon sun exposure. However, also in these 2 patients, UV‐exposed skin areas were more strongly affected. Occasionally (patients
Contact Dermatitis – Wiley
Published: Jan 1, 2018
Keywords: ; ; ; ; ; ; ; ; ; ;
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