Multiple Bowen's diseases and basal cell carcinomas in a patient with acute promyelocytic leukemia treated with arsenic trioxide: A case report and effective treatment with photodynamic therapy.

It is very rare that multiple Bowen's disease (BD) and basal cell carcinoma (BCC) lesions develop in a single patient. Routine therapy for the multiple lesions is not satisfactory. The present authors report on a patient who had developed multiple BD and BCC lesions for 12 years after arsenic trioxide treatment for his acute promyelocytic leukemia 20 years before. The patient with multiple lesions was successfully treated with photodynamic therapy.