HER2-Positive Metaplastic Spindle Cell Carcinoma Associated with Synchronous Bilateral Apocrine Carcinoma of the Breast
Figure 4
Immunohistochemical staining of the right breast carcinoma. (a) Spindle-shaped tumor cells were focally and weakly positive for cytokeratin CAM5.2, but diffusely and strongly positive for (b) CD10 and (c) HER2 oncoprotein. (d) Apocrine carcinomas strongly expressed HER2 in their cell membrane.
