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Angiodysplasia is the most common vascular lesion of the gastrointestinal tract, and this condition may be asymptomatic, or it may cause gastrointestinal (GI) bleeding.
Angiodysplasia may also be caused by a condition characterized by colon spasms that may lead to an enlargement of the blood vessels of the area affected. Moreover, an inflammation of the blood vessels creates a narrow passage between the artery and the vein known as arteriovenous fistula.