title: [Gastrointestinal hemorrhage of unknown etiology].
mesh_terms: D001012:Aorta, Abdominal; D001019:Aortic Rupture / Q000150:complications; D001165:Arteriovenous Malformations / Q000150:complications; D003092:Colitis / Q000150:complications; D003106:Colon / Q000098:blood supply; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D007412:Intestinal Fistula / Q000150:complications; D007416:Intestinal Perforation / Q000150:complications; D007511:Ischemia / Q000150:complications; D013270:Stomach / Q000098:blood supply
vernacular_title: Krwawienia z przewodu pokarmowego o trudnej do ustalenia przyczynie.