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Representative tumor necrosis factor receptor-associated protein 1 immunohistochemistry staining in ulcerative colitis non-progressors and ulcerative colitis progressors. A: Normal rectum from a normal control; B: Non-dysplastic rectum from a non-progressor (NP); C: Non-dysplastic rectum from a progressor (P); D: Low grade dysplasia from a progressor; E: High grade dysplasia from a progressor; F: Cancer from a progressor. All images were taken at × 20 magnification. P: Progressor.
