MUC1 and pancreatic intraductal papillary-mucinous neoplasm: We again see that patients with IPMN and cancer show higher average levels of anti-MUC1 IgG compared to healthy donors and importantly when IgG OD of each patient was paired with the same patient's percent of MDSC (Figure 3D), there was a negative correlation (p = 0.132, r = −0.3941).