Strikingly, we found that in as many as 24 TCGA cancer types, quantitative CD20 protein levels lacked significant correlations with MS4A1 mRNA levels (Pearson R > 0.2, P < 0.05 as cutoffs), except for five cancer types [esophageal carcinoma (ESCA), STAD, testicular germ cell tumors (TGCT), cholangiocarcinoma (CHOL), and skin cutaneous melanoma (SKCM)] (Fig. 1e). Here, MS4A1 is linked to cutaneous melanoma.