Some notable tumor-associated factors found in both the EL4 and Lewis lung cancer cell lines are hepatoma-derived growth factor (HDGF), vascular endothelial growth factor A (VEGFA) and platelet-derived growth factor C (PDGFC), transforming growth factor beta (TGFβ), and marcrophage colony stimulating factor (CSF1). Here, CSF1 is linked to neoplasm.