CGA and pancreatic insulinoma: The postoperative levels of CgA in patients with insulinomas were almost the same as the levels in healthy controls (Figure 2B, median 50.4 ng/ml vs. 53.4 ng/ml).ROC curve showed that CgA values at 60.4 ng/ml distinguished patients with insulinomas from healthy controls with the sensitivity of 66.7% and specificity was 73.3%, AUC was 0.724 (Figure 3A).