Diagnostic value of serum pepsinogen, gastrin, and carbohydrate antigens in gastric ulcer and gastric cancer

Figure 1 Receiver operating characteristic curve of serum pepsinogen, gastrin-17, carcinoembryonic antigen, carbohydrate antigen 19-9, and carbohydrate antigen 72-4 in different disease states. A: Receiver operating characteristic (ROC) curve of gastric cancer and chronic non-atrophic gastritis; B: ROC curve of chronic non-atrophic gastritis and gastric ulcer; C: ROC curve of gastric ulcer and gastric cancer. ROC: Receiver operating characteristic; PG: Pepsinogen; G17: Gastrin-17; CEA: Carcinoembryonic antigen; CA: Carbohydrate antigen.

Figure 2 Receiver operating characteristic curve of serum pepsinogen, gastrin-17, carcinoembryonic antigen, carbohydrate antigen 19-9, and carbohydrate antigen 72-4 combined diagnosis of gastric ulcer and gastric cancer. ROC: Receiver operating characteristic.