Breast Cancer Metastasis in a Renal Carcinoma Pulmonary Metastasis: A Rare Example of Tumor-to-Tumor Metastasis

<div>Immunohistochemical stains. (a) (Cam5.2, 200x) Both neoplasms are positive for cytokeratins, confirming an epithelial origin of the two neoplastic populations. (b) (CD10, 200x) Strong and diffuse positivity for CD10, characteristic of ccRCC. Highlight the antibody’s negativity in the breast carcinoma cell population. (c) (ER, 200x) Strong and nuclear positivity for the antibody directed to ER in breast carcinoma cells. Highlight the antibody’s negativity in the ccRCC component.</div>

Case Reports in Oncological Medicine

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Figure 5

Figure 5: Breast Cancer Metastasis in a Renal Carcinoma Pulmonary Metastasis: A Rare Example of Tumor-to-Tumor Metastasis 