MRC1 and neoplasm: We found that in 8505C xenograft tumors, 42% of the macrophages expressed CD206 (CD11b+ F4/80+ CD206+ cells, Figure 3D), while 40% of them expressed CD206 in C643 xenograft tumors (CD11b+ F4/80+ CD206+ cells, Figure 3E), demonstrating a similar frequency of M2-like macrophages in both tumor types (Figure 3F).