CD4 and hepatocellular carcinoma: The results showed that the expression of SAMD13 was significantly correlated with B cell (r = 0.159, p = 3.19e − 03),CD8 + T cells (r = 0.106, p = 5.03e-02), CD4 + T cells (r = 0.282, p = 1.02e − 07), macrophage (r = 0.291, p = 4.32e-08), neutrophils (r = 0.148, p = 5.93e − 03), and dendritic cells (r = 0.249, p = 3.32e-06)in HCC (Fig. 3C).