FBL and cancer: Interestingly, conditioned media from cancer-associated fibroblasts (EC6-Fib, EC7-Fib, EC11-Fib and EC14-Fib) induced a contrasting effect: the growths of both the primary endometrial cancer cells (EC6-Ep and EC14-Ep) and the commercial endometrial cancer cells (ECC-1 and HEC-1A) were markedly enhanced in a dose-dependent manner (Figure 4A–D).