Atherosclerotic emboli.
D001161:Arteriosclerosis / Q000150:complications*; D004617:Embolism / Q000209:etiology* / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012007:Rectum / Q000098:blood supply / Q000473:pathology; D012812:Sigmoidoscopy