IL6 and gastric cancer: Moreover, previous studies investigating the relationship of peritumoral VAT HU and VAT SUV with immunohistochemical findings of peritumoral VAT in patients with gastric cancer and colorectal cancer found that both VAT HU and VAT SUV had significant positive correlations with the degree of interleukin-6 expression and that VAT SUV was further significantly positively correlated with the degree of M2 type macrophage infiltration [15,16].