CD79A and neoplasm: When categories within tumor grade were analyzed, the result showed that the mean IgG and IgA levels of those with moderately and poorly differentiated tumor were not significantly higher than those of the cases with well-differentiated tumor (IgG: 0.3876 ± 0.1632 vs. 0.3042 ± 0.1556, P = 0.180; IgA: 0.4139 ± 0.1719 vs. 0.3887 ± 0.1410, P = 0.678).