Role of endoscopy in acute gastrointestinal bleeding in real clinical practice: An evidence-based review

Table 2 Causes of acute small bowel and lower gastrointestinal bleeding by category

Type	Causes
Anatomic	Diverticulosis, including Meckel’s diverticulum
	NSAID-induced enterocolopathy
	Antiplatelet or anticoagulant-induced enterocolopathy
	Stercoral ulceration (solitary rectal ulcer syndrome)
	Anal fissure
Vascular	Ischemic colitis
	Hemorrhoids
	Angiodysplasias (Angioectasias)
	Colorectal varices
	Postpolypectomy bleeding
	Radiation telangiectasia or proctitis
	Dieulafoy’s lesion
Neoplastic	Colorectal polyps
	Colorectal and anal cancers
	Small bowel tumors, including gastrointestinal stromal tumor
	Metastatic or direct invasion from other cancer
Inflammatory	Inflammatory bowel disease
	Infectious colitis

Data from references[111-113]. NSAID: Non-steroidal anti-inflammatory drug.