(A) Ulcerative colitis, (B) Esophagitis, (C) Normal z-line, (D) Dyed lifted polyps, (E) Dyed resection margins, (F) Out of patient, (G) Normal pylorus, (H) Stool inclusions, (I) Stool plenty, (J) Blurry nothing, (K) Polyps, (L) Normal cecum, (M) Colon clear, (N) Retroflex rectum, (O) Retroflex stomach, and (P) Instruments