title: Letter: Vascular colonic lesions causing rectal bleeding in Bantus.
mesh_terms: D000810:Angola; D044383:Black People; D003106:Colon / Q000098:blood supply*; D005734:Gangrene / Q000150:complications*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D008297:Male; D012007:Rectum