CD68 and breast cancer: We also found that CD47 and CD68 expression were more abundant in hormone receptor-negative breast cancer, such as triple-negative breast cancer (TNBC) (Fig. 3a, b) and HER2 overexpression breast cancer (Fig. 3c, d), while the expression density of CD47 and CD68 decreased in luminal-type breast cancer (Fig. 3e, f).