A 63-year-old Japanese woman was referred to our hospital for the treatment of a pigmented macule on the chest, which was histopathologically diagnosed as basal cell carcinoma (BCC) at another clinic. The patient noted the macule 14 years ago, and it had gradually increased in size. Physical examination revealed multiple brown macules (nine in total) distributed on the head and trunk; all of them were later confirmed as BCC after excision. There are several conditions that can predispose patients to BCC, such as nevoid basal cell carcinoma syndrome, xeroderma pigmentosum, and multiple sebaceous nevus; however, in this case, the patient did not suffer from any such known predisposing condition.
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