Abstract
BACKGROUND Melanocyte colonization of breast carcinoma cells may occur in those tumors that breach the epidermal—dermal interface. The resultant melanin deposition in tumor cells rarely leads to clinical pigmentation of the tumor. Typically, selective staining methods are required to detect the pigment. OBSERVATION The authors describe a 60-year-old woman with a history of mammary carcinoma and an irregularly pigmented nodule with peripheral globules and a blue-white veil on dermoscopy, which was a clinical and dermoscopic mimic of malignant melanoma. CONCLUSIONS Awareness of melanocyte colonization of non-melanocytic tumor cells and the dermoscopic—histologic correlations can aid in avoiding a potential pitfall, and emphasize the importance of such relationships, when using this tool.
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