PPBP and squamous cell carcinoma: In patients with squamous cell carcinoma, CATPIII/CXCL7 was 1346.49 (869.74, 1632.24) ng/mL, 1176.80 (793.33, 2571.07) ng/mL, 1355.38 (903.20, 1856.07) ng/mL, 1222.86(1023.39, 1715.38) ng/mL corresponding to disease stage I to IV, respectively.