Fig. 3

Features of immunohistochemical staining. Immunohistochemical staining showed that the tumor cells were negative for CK (AE1/AE3) and GATA3, which highlights the trapped ductal epithelium of the breast (A, B). The tumor cells were negative for CD3, which highlights T cells in the background (C), while the tumor cells were positive for CD20 (D), Bcl-6 (F), and MUM-1 (G). The tumor cells were negative for CD10 (E). C-Myc (Y69) (40%) (H), Bcl-2 (80%) (I), and the Ki-67 (J) proliferation index were high (80%). EnVision method