ITK and hepatocellular carcinoma: Four of them are TEC family kinase members: ITK, interleukin-2-inducible T-cell kinase; TEC, tyrosine kinase expressed in hepatocellular carcinoma; BMX, bone marrow-expressed kinase; and RLK/TXK, resting lymphocyte kinase/ T and X cell expressed kinase (Smith et al., 2001).