No abstract

Background: Allergic contact dermatitis (ACD) occurs as a result of repeated contact with exogenous materials that previously has been sensitized with the same material, such as watch or accessories used in both men and women. Potassium dichromate (hexavalent form of chromium) are usually found in the material made of metal, cement, leather, ink and paint. Cobalt is a hard metal which is commonly used in production of other metals to harden and strengthen. Objectives: This case report of ACD occurring in a 22-year-old woman was caused by the use of watch. A 22-year-old woman complained of itching on the hand after wearing a watch. The clinical examination on right hand was found hyperpigmentation and erythematous macules. Methods: ACD diagnosis is confirmed with positive patch test. Diagnosis in this case was made based on history, clinical symptoms and patch test. From anamnesis, the lesions appeared after wearing a watch. Patch test is done by placing a patch allergens in patient using gamma chamber, and reading the results within 48, 72 and 96 hr after the patch test. Results: The result showed that allergic occuring in these patients was suspected due to the same material of both types of adhesive watch which contains potassium dichromate 0.5% dan cobalt chloride 1%. Conclusions: We can consider an allergic contact dermatitis caused by potassium dichromate 0.1% and cobalt chloride 1% in patient with allergic rash after wearing a watch with patch test confirmation.Background: Iodine compounds are widely used as antiseptics, being Betadine the most common antiseptic solution used in Spain. Contac dermatitis due to povidone iodine has never been considered frequent, specially taking account it is widely used. Isolated communications of contact dermatitis, irritative as well as allergic, havebeen reported and distinguishing these two entities can be challenging, specially because of the lack of consensus of standarized procedures. Objectives: To throw light on the procedures to accurately diagnosing povidone iodine contact dermatitis. Methods: We present 7 cases of postsurgical contact dermatitis due to povidone iodine. The diagnosis was based ont he clinical manifestations, the history of exposure, the site of the lesions, and the results of patch tests. Repeated open appplications tests (ROAT) and patch tests were performed n patients, as well as in a control group. Results: Patch tests with 10% povidone iodine in petrolatum were ositive in all patients, but ROAT were negative. Results from control group confirmed our findings. Conclusions: Based on our results, patch test with 10% povidone iodine in petrolatum is the most appropiate test in order to diagnose contact dermatitis due to povidone iodine. As far as ROAT was negative we conclude that the presence of the antiseptic solution under occlusion during surgery is necessary, both for the symptoms to develop and for the diagnosis to be made. This condition may be underdiagnosed.