Rectum, mild ulcerative colitis of distal rectum, multiple linear ulcerations, procitis

Rectum, non-bleeding internal hemorrhoid retrograde view

Rectum, non-bleeding internal hemorrhoid

Colon, hyperplastic polyp in ulcerative colitis

Colon, solitary sigmoid adenomatous polyp

Ileum, small apthous ulcer with florid Crohn's colitis

Colon, pseudomembranous colitis, moderate

Colon, pseudomembranous colitis, severe

Duodenum, carcinoid