In a pancreatic tissue microarray (TMA) of 179 samples, EGFR was positively expressed in 20.8% (10/48) of normal pancreatic tissues and in 71.4% (5/7), 66.7% (14/21) and 78.6% (81/103) of the chronic pancreatitis, pancreatic preneoplasia and PDAC samples, respectively (Figure 5C, Table 1). Here, EGFR is linked to chronic pancreatitis.