CDHR5 and chronic pancreatitis: The CDHR5 IHC staining was performed in forty‐seven pancreatic tissues with different pathological grades, including 12 (25%) chronic pancreatitis (CP), 16 (34%) PanIN1, 10 (21%) PanIN2, 3 (7%) PanIN3 and 6 (13%) PDAC (Figure 1C).