AFP was initially found to be taken up by fetal cells (Sell et al., 1985; Iturralde et al., 1991; Alava et al., 1999; Nierhoff et al., 2005), and later studies found that muscle tumor cells also internalize exogenous AFP (Uriel et al., 1983; Lorenzo et al., 1996; Mizejewski, 2011b, 2018). The gene discussed is AFP; the disease is neoplasm.