A 39-year-old man was admitted to the department of cardiovascular surgery for an operation of lower limbs varication. Four days after the admission, itchy erythematous edematous rash appeared on his face, neck and elbow, and became enlarged. Positive reactions to patch testing were induced by the pajamas. We analyzed the pajamas and obtained samples of textile dyes used for polyester. The patient reacted positively to Disperse Blue 106 and 124. We diagnosed his allergy as contact dermatitis induced by disperse dyes similar to Disperse Blue 106 and Disperse Blue 124. When a toxic rash occurs during hospitalization, we should be aware of a possible occurrence of contact dermatitis due to the patient's pajamas.
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