Compared to their microsatellite stable (MSS) counterparts, MSI cancers were characterized by a significantly lower infiltration of M2 macrophages (p = 5.03·10−8) and neutrophils (p = 1.28·10−17) and by a significantly higher infiltration of M1 macrophages (p = 3.66·10−3), NK cells (p = 5.76·10−7), CD8+ T cells (p = 1.75·10−4), Treg cells (p = 1.34·10−3), and dendritic cells (p = 3.67·10−3). The gene discussed is CD8A; the disease is cancer.