Multiple yellow papules arising within previously irradiated breast skin

Key Points

• To investigate the occurrence of papules in a breast cancer survivor previously treated with radiotherapy.
• Conducted a biopsy of new papules in the irradiated breast skin.
• Analyzed the histopathological features of the biopsy specimens.
• Biopsy showed adult-onset xanthogranuloma, a benign condition.
• Initial concerns for cutaneous metastasis were alleviated.