MUC4 and KMT2C were both found to be significant in uterine corpus endometrial carcinoma, being associated with tumors enriched with IgA (MUC4: estimate = 3.58, adjusted P = 0.049; KMT2C: estimate = 4.80, adjusted P = 0.01) and depleted of IgG (MUC4: estimate = −4.85, adjusted P = 8 × 10−5; KMT2C: estimate = −3.82, P = 0.007, adjusted P = 1; Extended Data Fig. 8b and Supplementary Data). Here, CD79A is linked to uterine corpus endometrial carcinoma.