In the cancer patients who had detectable circulating preoperative C-reactive protein concentrations (n=41), log-transformed concentrations of C-reactive protein were significantly correlated with interleukin-6 (r2=0.62, P<0.001, Figure 1A) and interleukin-10 (r2=0.33, P<0.001, Figure 1B). Here, IL6 is linked to cancer.