title: Unusual vascular causes of gastrointestinal bleeding.
mesh_terms: D000328:Adult; D000368:Aged; D000792:Angiography; D001165:Arteriovenous Malformations / Q000150:complications* / Q000175:diagnosis; D004724:Endoscopy; D005260:Female; D005336:Fiber Optic Technology; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D005770:Gastrointestinal Neoplasms / Q000150:complications* / Q000175:diagnosis; D006391:Hemangioma / Q000150:complications; D006393:Hemangiopericytoma / Q000150:complications; D006801:Humans; D008297:Male; D008875:Middle Aged; D013684:Telangiectasis / Q000150:complications