ATF6 and colitis: It should be noted that the ATF6-IHC score in LGD (median, 6.0, range, 2–12) was significantly different (p < 0.001) from the one in non-neoplastic lesions, i.e., inactive and active colitis samples (median, 3.0, range, 0–8, and median, 3.0, range, 0–11, respectively).