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A 9\u2010year\u2010old mixed\u2010breed female presented with mammary and cutaneous masses. Imaging revealed no pulmonary metastasis but metallic foreign bodies. Histopathology identified a low\u2010grade intraductal carcinoma (HER2\u2010negative), melanosis with borderline proliferative features in an inguinal lymph node, and benign acrochordons. Immunohistochemistry confirmed S100 positivity and elevated Ki\u201067 in the melanocytic component, suggesting melanocytic lesion with borderline proliferative features. Treatment included bilateral mastectomy, lymph node excision, and chemotherapy. Post\u2010treatment bloodwork showed mild cytopenias and biochemical changes consistent with hepatocellular stress. No recurrence or metastasis occurred within 6 months. 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