IHC staining result of ADAMTS8, ADAMTS18, and ADAMTS20 in IDC and non-proliferative character of FA. In IDC, the positive expressions of ADAMTS8 and ADAMTS18 were significantly higher, while ADAMTS20 was lower, compared with those in FA. The sepia sections represent the stained proteins. The results showed that proteins were distributed in both cytoplasm and cytoplasm interstitial, mainly in cytoplasm.