hPG80 is detected in the blood of patients with various cancer origins. (A) Comparison of median hPG80 concentrations between healthy blood donors (n = 557) and cancer patients (n = 1546). (B) Comparison of median hPG80 concentrations between all types of cancers tested: breast (n = 62), CRC (n = 305), esophagus/stomach (n = 74), kidney (n = 184), liver (n = 110), lung (n = 60), skin melanoma (n = 38), ovary (n = 44), pancreas (n = 34), prostate (n = 558), uterus (n = 77). (C) Correlation between GAST mRNA tissue expression and hPG80 in the blood from the same lung cancer patient (n = 11).