FAP expression was positively linked to MSI in colon adenocarcinoma and negatively related to cholangiocarcinoma, lung adenocarcinoma, uveal melanoma, STAD, lung squamous cell carcinoma (LUSC), skin cutaneous melanoma, and head and neck squamous cell carcinoma (HNSC) (Figure 1C). Here, FAP is linked to colon adenocarcinoma.