CD4 and non-small cell lung carcinoma: CD74 was overexpressed in C4 [49]/C9-CTLA4 [73] CD4 T cell clusters, C5 and C6 [49]/C4-GZMK [73] CD8 T cell clusters, NSCLC tumor B cells, and suppressive tumor Tregs of CD4-C9-CTLA4 cells vs. other tumor-infiltrating Tregs of CD4-C8-FOXP3 cells [73].