We observed a strong correlation between the expression of NAIP and the expression of several immune cells, including CD8+ T cells, M1 and M2 macrophages, tumor-associated macrophages (TAMs), DCs, natural killer cells (NKs), B cells, T-helper type 1 cells (Th1), Th2, neutrophils, regulatory T cells (Tregs), and monocytes. This evidence concerns the gene NAIP and neoplasm.