text: <unk>  is the most common vascular malformation of the GI tract and accounts for 20% of the major episodes of lower intestinal bleeding. The prevalence of<unk>  is less than 1% in healthy patients older than 50 years undergoing screening colonoscopy. The incidence of<unk>  is equal in both men and women. The majority of the affected population is older than 60 years. The most common location of<unk>  of the gastrointestinal tract is the colon.
option_0: Angiodysplasia epidemiology and demographics
option_1: Atherosclerosis epidemiology and demographics
option_2: Carcinoid syndrome epidemiology and demographics
option_3: Varicose veins epidemiology and demographics
option_4: Upper gastrointestinal bleeding epidemiology and demographics
option_5: Peptic ulcer epidemiology and demographics
option_6: Colon polyps epidemiology and demographics
option_7: Gastrointestinal varices epidemiology and demographics