SDC1 and Pancreatic cysts: This was also true for median serum level of SDC1 which were elevated in PDAC compared with pancreatic cysts patients (43.3 ng/mL [IQR 32.2–71.2] vs. 30.1 ng/mL [IQR 26.5–35.4], respectively; p < 0.001) (Figure 1B).