PECAM1 and breast cancer: The cell clusters were divided into seven cell groups (Figure 5C): SMC (Tagln, MYH11), fibroblasts (Fib) (Dcn, Lum), EC (Pecam1), B cells (BC) (CD19, CD79b), T cells (TC) (CD3e, CD3g, CD3d), M1-type macrophages (CD68, CD14, CD163), and M2-type macrophages (CD68, CD14, CD163).