Study of serum tumor markers in the early diagnosis of pancreatic cancer

Figure 1 Receiver operating characteristic curves for early combined diagnosis of pancreatic cancer and pancreatic cancer at different tumor-node-metastasis stages using serum tumor markers (carbohydrate antigen 19-9, carcinoembryonic antigen), serum soluble intercellular adhesion molecule-1, and chitinase-3-like protein 1. A: Receiver operating characteristic (ROC) curve for pancreatic cancer (overall); B: ROC curve for stage I pancreatic cancer; C: ROC curve for stage II pancreatic cancer. CA-19-9: Carbohydrate antigen 19-9; CEA: Carcinoembryonic antigen; sICAM-1: Soluble intercellular adhesion molecule-1; CHI3 L1: Chitinase-3-like protein 1; TPR: True positive rate; FPR: False positive rate.