This unsettling case series details two women with triple negative breast cancer developing carcinoma erysipeloides, a rare form of cutaneous metastasis in which malignant cells infiltrate superficial dermal lymphatics to produce a sharply-demarcated erythematous plaque, within post-mastectomy radiation fields a few months after finishing treatment mimicking benign dermatitis. | Rummel, Adv Radiat Oncol 2026
