In addition, the tumor immune infiltration analysis also indicated that most of the anti-tumor immune cells, such as memory B cells, CD8+ T cells, activated NK cell, monocytes, and macrophage M1 were increased in the FerrLowImmHigh group, whereas B cell plasma and macrophage M0 cells were observed in the FerrHighImmLow group (Figure 4D). The gene discussed is CD8A; the disease is neoplasm.