Description
A 61-year-old woman was referred to the dermatology clinic with multiple skin lesions on her scalp and central back. They were relatively asymptomatic but had increased in size over the previous few months. Her medical history was significant as she had a cerebellar medulloblastoma when she was 19 years old that was treated with a 6-month course of radiotherapy on her scalp and along the spinal cord.
On examination, she had multiple erythematous scaly plaques on the right occipital scalp and lower back, consistent with superficial basal cell carcinomas (BCC) and a nodular BCC in the left occipital scalp. They were present within the areas previously treated with radiotherapy, arising from the skin that showed poikilodermatous (atrophic) changes (figures 1 and 2). Scarring alopecia from the previous radiotherapy was also prominent in the occipital scalp. A diagnosis of postradiotherapy BCCs was made. In...
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