The results of mIF experiments indicated that CK19 expression was associated with tumor cells in PT and LM, and the co‐localization of OLR1 and SLC7A7 was significantly higher in LM than in PT, highlighting the potential of OLR1 and SLC7A7 as diagnostic biomarkers for patients with pancreatic cancer liver metastases (Figure 4K,L). This evidence concerns the gene SLC7A7 and familial pancreatic carcinoma.