In-transit metastasis of the breast region from malignant melanoma of the trunk.

Extramammarian cancer metastases to the breast are rare. Melanoma is one of the malignancies that can metastasise to the breast. The distinction between a primary breast carcinoma and a metastatic neoplasm is crucial because surgical and therapeutic treatment options will vary accordingly. The present report concerns a case of breast metastasis from melanoma of the trunk. A 50-year-old man with a self-detected left breast lump who had previously undergone wide local excision and axillary dissection for melanoma was admitted to our department. Ultrasonography showed an 0.8 cm hypoechoic nodule with silent margins. The palpable mass was excised. Surgical pathology revealed metastatic melanoma.