As can be seen from the images that Rad51 expression had considerably positively correlation with infiltration level from B cells (partial.cor = 0.49, p = 3.88 × 10−22), CD8 + T cells (partial.cor = 0.41, p = 2.52 × 10−15), CD4 + T cells (partial.cor = 0.285, p = 7.75 × 10−8), macrophage (partial.cor = 0.469, p = 4.80 × 10−20), neutrophil (partial.cor = 0.381, p = 2.34 × 10−13), and dendritic cell (partial.cor = 0.51, p = 6.17 × 10−24) in HCC, it worth noting that, Rad51 expression was also positively correlated with the tumor purity (COR = 0.099, P = 6.55 × 10−2, Figure 5a). Here, RAD51 is linked to hepatocellular carcinoma.