Table 1.

Patients excluded from the study (n = 111)

No biopsies proximal to the splenic flexure (n = 34)

Collagenous colitis (n = 26)

Histopathologically normal colonic mucosa (n = 24)

Lymphocytic colitis-like but intraepithelial lymphocytes <20 per 100 surface epithelial cells (n = 13)

Miscellaneous conditions (infectious colitis, carcinoid syndrome, lymphoid hyperplasia) (n = 6)

Histopathological features of ulcerative colitis or Crohn’s disease (n = 4)

Insufficient biopsy quality for reassessment (n = 4)