HGF and ovarian neoplasm: Besides LPA, growth factors [such as epidermal growth factor (EGF), transforming growth factor beta (TGF-β) and hepatocyte growth factor (HGF)] which are also present in the ovarian tumor microenvironment have been associated with EMT induction through (i) the promotion of the cleavage of Ecad fragments to abrogate cell–cell adhesion and (ii) the activation of complex signaling pathways [46,47,48].