CEACAM8 and neoplasm: In contrast, we found that tumor-associated neutrophils, expressing the carcinoembryonic antigen-related glycoprotein CD66b, were present at significantly higher levels in TT as compared with NM (TT: 23.2 ± 19.6 vs. NM: 10.36 ± 10.78, p = 0.0017; Figure 2H).