TGFA and gastric cancer: In gastric cancer, data are contradictory, as one study associated higher TGFα serum levels with a better response to cetuximab, longer progression-free survival and longer overall survival, while another publication reported a correlation between low TGFα serum levels and a higher response rate to cetuximab in combination with modified FOLFOX6 (Han et al. 2009; Zhang et al. 2014).