The median PCT level was higher in febrile cancer patients (0.310 ng/ml [range 0.02–154.7]) compared to non-febrile cancer patients (0.1 ng/ml [range 0–30.43]) as well as to the control group of non-cancer patients (0.029 ng/ml [range 0–0.203]) (p<0.0001). Here, CALCA is linked to cancer.