2 patients are reported with chronic hand dermatitis related to sensitization to sodium hypochlorite, as the active component in a bleaching product. To avoid irritant reactions in patch testing, a sodium hypochlorite concentration of 1.0% appeared to be useful. It is concluded that with regard to the frequent use of bleaching agents, allergy to sodium hypochlorite must be considered in certain cases of unidentified chronic allergic hand dermatitis.

8 Tomson N, Lim SP, Abdullah A, Lanigan SW. The treatment of port-wine stains with the pulsed-dye laser at 2-week and 6-week intervals: a comparative study. Br J Dermatol 2006; 154:676-9. 9 Shah S, Alster T. Laser treatment of dark skin: an updated review.Am J Clin Dermatol 2010; 11:389-97. 10 Tunnell JW, Nelson JS, Torres JH, Anvari B. Epidermal protection with cryogen spray cooling during high fluence pulsed dye laser irradiation: an ex vivo study.

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In lupus erythematosus (LE), vesicles and bullae are only rarely seen. However, in some instances such efflorescences might suggest an association with distinct cutaneous diseases, including erythema multiforme, toxic epidermal necrolysis or autoimmune blistering disorders such as bullous pemphigoid, pemphigus vulgaris, and dermatitis herpetiformis Duhring. Another blistering disease that has been described in association with cutaneous and systemic LE is porphyria cutanea tarda (PCT). PCT is a metabolic disorder caused by a deficiency of the fifth enzyme in heme biosynthesis, uroporphyrinogen decarboxylase. Here, we report on a 57-year-old Caucasian woman of Dutch origin with a medical history of mild cutaneous LE who developed skin fragility, blistering skin lesions, milia, and facial hypertrichosis. Subsequent porphyrin analysis in urine and feces confirmed the suspected simultaneous manifestation of LE and PCT.

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