Leiomyosarcoma of the intestine presenting with melaena.
D006801:Humans; D007414:Intestinal Neoplasms / Q000175:diagnosis* / Q000601:surgery*; D007890:Leiomyosarcoma / Q000175:diagnosis* / Q000601:surgery*; D008297:Male; D008551:Melena / Q000209:etiology*; D008875:Middle Aged