PGR and neoplasm: On the other hand, sTRAIL, in contrast to NF-κB, showed very high negative correlation with tumour grade (respectively r=-0.914, p<0.001), high negative correlation with the presence of HER2 (r=-0.768, p<0.001) and metastasis (respectively r=-0.858, p<0.001), high positive correlation with the presence of ER (both r=0.840, p<0.001) and PR (respectively r=0.858, p<0.001).