TGFB1 and hepatocellular carcinoma: Of the six types of immune infiltrates identified in human tumors [C1 (wound healing), C2 (INF-γ dominant), C3 (inflammatory), C4 (lymphocyte depleted), C5 (immunologically quiet), and C6 (TGF-β dominant)] [25], and no patient sample belonged to the C5 immune subtype in HCC.