CD79A and colorectal carcinoma: Likewise, the mean anti-ETBF IgG and IgA levels of early-stage CRC were not significantly higher than those of advanced stage CRC (IgG: 0.3320 ± 0.0760 vs. 0.3034 ± 0.1191, P = 0.618; IgA: 0.7448 ± 0.1930 vs. 0.7044 ± 0.1965, P = 0.624) (Figure 5).