Unusual sonographic appearance of melanoma metastases in the breast

Metastasis to the breast is a relatively rare occurrence that can arise from virtually any primary malignancy. Melanoma is the most common primary malignancy to metastasize to the breast. On sonography, breast metastases (including melanoma) are usually round or oval hypoechoic masses with circumscribed or indistinct margins. These sonographic characteristics have been described by multiple authors. In our review of the literature, we found no report of melanoma metastases to the breast appearing sonographically as hyperechoic masses. We report a unique case that describes this finding.