Gastrointestinal bleeding and arthropathy.
D000474:Alkaptonuria / Q000150:complications*; D001847:Bone Diseases / Q000209:etiology*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D007592:Joint Diseases / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D009794:Ochronosis / Q000209:etiology*