CD68 and neoplasm: We further co-stained THBS2 with markers of cytotoxic T (CD8), Treg (FoxP3) and B (CD19) lymphocytes, as well as tumor-associated macrophages (CD68) 84 and nature killer (NK) cells (CD56) 85, which showed that immune cells were mainly located at the stromal compartment (Figure 7F; Figure S14A).