Anatomic Features	Diverticular Disease	Vascular Lesions
Normal	Diverticulosis	Angiodysplasia
Appendix	Diverticulitis	Bleeding Angiodysplasia
Melanosis	Visible Vessel	Spider Angioma
Anastomosis	Bleeding	Hemangioma
Retained Suture	Inverted	Rectal Varices
Polypectomy Scar	Long Inverted	Colonic Varix
Foreign Body	Diverticular Polyp	Internal Hemorrhoids
Hematoma	Ileal Diverticulum	Bleeding Hemorrhoids
Sigmoid Volvulus		Dieulafoy's Lesion
Vascular Graft		Phlebectasia
Rectal Prolapse
Rectovaginal Fistula
Lymphoid Hyperplasia
Mucosal Bridge
Ileal Villi
Mucosal abrasion
Anal Fissure
Hypertrophied Anal Papillae
Ileal web
Prostate
Colitis	Benign Tumors	Malignant Tumors
Pseudomembranous	Hyperplastic Polyp	Carcinoma-in-situ
Ischemic	Diminutive Polyp	Malignant Polyp
Post-irradiation	Serrated Adenoma	Adenocarcinoma
Prep-induced	Pedunculated Adenoma	Kaposi Sarcoma
Salmonella	Sessile Tubular Adenoma	Squamous Cell
Cytomegalovirus	Sessile Villous Adenoma	Stent Placement
NSAID-Induced	Familial Polyposis	Lymphoma
Colonic Ulcer	Polypectomy	Carcinoid
Anastomotic Ulcer	Post-Polypectomy Bleeding	Metastatic
Crohn's/Ulcerative	Bleeding Polyp	Periappendiceal
Stricture	Diverticular Polyp	Recurrent Carcinoma
Colonic Abscess	Lipoma	Neovascularity
Campylobacter	Necrotizing Lipoma
Cocaine	Leiomyoma
	Hamartoma
	Fibroepithelial Polyp
	Granular Cell Tumor
	Rectal Nevus
	Rectal Condyloma
	Juvenile Polyp
	Neurofibroma
	Ganglioneuroma
	Appendiceal Polyp

Esophagus

Stomach

Duodenum

Capsule Endoscopy

Inflammatory Bowel Disease

Miscellaneous