Background Limited data exist on occupational allergic contact dermatitis (OACD) in Turkey. Objectives To investigate the epidemiologic profile of OACD in Turkey. Methods A retrospective cohort study on 294 patients with OACD among 2801 consecutively patch‐tested patients in the Allergy Unit of the Dermatology Department of İstanbul Faculty of Medicine between 1996 and 2019. Results The overall prevalence of OACD was 10.5%, showing a male predominance. OACD was most frequently seen in construction workers (45.2%), followed by hairdressers, metalworkers, health care workers, and miscellaneous. The main relevant allergens were chromium in cement, thiurams in rubber gloves, hairdressing chemicals, resins/glues/plastics, metals, isothiazolinones, and fragrances. Hands were the mainly involved site (95.6%). Airborne eczema was observed in 21.4%. Hand and foot eczema and co‐sensitizations to chrome and thiuram and chrome and cobalt were significantly associated with being a construction worker. Sensitizations to isothiazolinones in house painters, ammonium persulfate and p‐phenylenediamine in hairdressers, and colophonium increased after 2010. Conclusion This was the largest group of data on OACD from Turkey, reflecting the importance of rubber glove allergy in all occupations and the striking increase in ammonium persulfate allergy among hairdressers. Chrome and cobalt were still the main cement allergens in Turkey, where the cement directive is not yet in force.

ÖzetReaktif dermatozlar infeksiyonlar, inflamatuar hastalıklar, ilaç kullanımı ve maligniteler başta olmak üzere birçok nedenle ortaya çıkabilirler. Böyle bir dermatozla karşılaşan hekimler dermatozu tedavi etmenin yanı sıra altta yatan nedeni araştırmaya da yönelirler. Bu derlemede, reaktif dermatozların paraneoplastik potansiyelleri değerlendirilerek tanı sonrası etyoloji, takip ve tedavide yapılması gerekenler irdelenmiştir. Sum maryReactive dermatoses may occur related to many underlying causes including infections, inflammatory diseases, medications and malignancies. In the management of these dermatoses the investigation of underlying cause is crucial besides the therapy of dermatosis. In this review, mainly the paraneoplastic potentials of reactive dermatoses have been evaluated and additionally the etiology, follow-up and treatment have been discussed. Recent literature about figurated erythemas (erythema annulare centrifugum, erythema gyratum repens, necrolytic migratory erythema), neutrophilic dermatoses (Sweet's syndrome, pyoderma gangrenosum, subcorneal pustular dermatosis) and erythema nodosum have been scrutinized. (Turkderm 2013; 47: Suppl 2: 69-77) Key Words: Paraneoplasia, reactive dermatoses, Sweet syndrome, erythema gyratum repens, necrolytic migratory erythema, erythema annulare centrifugum, subcorneal pustular dermatosis, erythema nodosum, pyoderma gangrenosum