CRP and neoplasm: Based on the gathered data, an optimal CRP level cutoff value of 1.8 mg/L was determined to differentiate between the opposing patient prognoses (area under the curve: 0.659; 95 % CI: 0.570–0.749) (Fig. 1a) as well as between the tumor recurrence and no further incidence of tumors (area under the curve: 0.659; 95 % CI: 0.566–0.752) (Fig. 1b).