Figure 1. Representative immunohistochemical images of low- or high-density CD68⁺, iNOS⁺, and CD163⁺ tumor-associated macrophages in bone marrow.

Consecutive sections were used for immunohistochemical studies: (A) CD68^high, iNOS^high, CD163^high; (B) CD68^low, iNOS^low, CD163^low. Positive macrophages were stained brown (× 400 magnification). The scale bars represent 50 μm.