Identification of pathologic features associated with “ulcerative colitis-like” Crohn’s disease

Figure 1 Microscopic features of "ulcerative colitis-like" Crohn’s disease. A: Acute ileitis with architectural distortion. Section shows prominent villous neutrophilc infiltrate and villous blunting; B and C: A cross-section of appendix shows active inflammation with crypt destruction and crypt abscess. This case only has distal colon involvement. The active appendicitis involves the entire appendix; D: A representative section of the colon shows prominent lamina propria neutrophilic infiltrate associated with ruptured crypt abscess; E: Prominent lymphoid aggregates are present in the superficial and deep submucosa.