Primary sclerosing cholangitis associated colitis: Characterization of clinical, histologic features, and their associations with liver transplantation

Figure 1 The degree of active inflammation was graded on a 4 tier scale (0-3). A: Cases without active inflammation were scored as 0 (200 ×); B: Cases with cryptitis and/or crypt abscesses involving less than 50% of the crypts were scored as 1 (200 ×); C: Cases with cryptitis and/or crypt abscesses involving more than 50% of the crypts were scored as 2 (200 ×); D: Ulceration was scored as 3 (200 ×).