A Case Series of Breast Metastases from Different Extramammary Malignancies and Their Literature Review

Figure 11

Case 11. A 40-year-old woman with gastric signet ring-cell carcinoma. A solid mass in the upper-outer quadrant of the right breast was detected on initial exploration. (a–b) Mammogram showed extremely dense parenchyma of the right breast, which corresponded to multiple pseudonodular, hypoechoic, irregular masses with indistinct margins on ultrasound (c–f). HE staining and immunohistochemistry analysis of the metastases. HE staining revealed the malignant cells in the breast tumor (g), and the immunohistochemistry analysis indicated that the cells were positive for MUC5AC (h) and CK20 (j).

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