Table 1.

Aetiology of obscure gastrointestinal bleeding

Vascular	Inflammatory	Neoplastic	Extraluminal	Rare causes
Angioectasias	Inflammatory bowel disease	Carcinoid	Haemobilia	Hereditary Haemorrhagic Telangiectasias
Dieulafoy’s Lesion	Peptic ulcer disease	Gastrointestinal stromal tumour	Aortoenteric fistula	Von Willebrand disease
Gastric antral vascular ectasia	Oesophagitis	Adenocarcinoma	Haemosuccus pancreaticus	Amyloidosis
Portal hypertensive gastropathy	Cameron erosions	Metastases (melanoma)		Henoch Schonlein Purpura
Varices	Meckel’s diverticulum	Lymphoma
Radiation enteritis	NSAID related gastropathy/enteropathy	Ampullary carcinoma
Haemorrhoids

NSAID: Non-steroidal anti-inflammatory drugs.