TREM2 and hepatocellular carcinoma: CXCL5 protein expression was negative in both HCC and adjacent tissues (Figure 12(d)), CXCL8 protein was less abundant in HCC and almost absent in adjacent tissues (Figure 12(e)), IL18RAP protein was moderately abundant in HCC and, to a lesser extent, in adjacent tissues (Figure 12(f)), and TREM2 protein was highly abundant in HCC tissues and moderately abundant in adjacent tissues (Figure 12(g)).