A 73-year-old Japanese man presented with multiple Bowen's disease on his left upper arm, right chest, and abdomen. In addition, five arsenic keratoses were observed on the extremities. Diffuse bronze-like pigmentation with scattered hypopigmented macules was also noticed on his trunk and the extremities. According to his occupational history, we speculated that these lesions may have been provoked by occupational arsenical exposure 47 years earlier.
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