CD4 and neoplasm: The cells in ccRCC2 can be classified into 13 different types, namely, CD4+ T cells, CD8+ T cells, tumour cells 1, NK cells, endothelial cells 1, endothelial cells 2, TAM1, CAF, mast cells, B cells, TAM2, tumour cells 2 and endothelial cells 3 (Figure 3C).