Overall, compared to melanoma samples with diploid/normal expression of IFNG and BIRC5, samples with bidirectional copy number variation of BIRC5 and increased copy number variation of IFNG had a lower level of immune infiltration, including B cells, CD4+ T cells, CD8+ T cells, macrophages, neutrophils, and dendritic cells (Figure 9A). This evidence concerns the gene CD8A and melanoma.