title: Melena and occult blood in the stool.
mesh_terms: D000328:Adult; D005189:False Positive Reactions; D005243:Feces; D006801:Humans; D007082:Ileum; D008297:Male; D008551:Melena / Q000175:diagnosis / Q000209:etiology*; D008722:Methods; D009780:Occult Blood; D013154:Spleen / Q000002:abnormalities