Alkaptonuria and ochronotic arthropathy.
D000474:Alkaptonuria / Q000150:complications*; D002114:Calcinosis / Q000209:etiology; D006801:Humans; D007403:Intervertebral Disc; D008297:Male; D008875:Middle Aged; D009794:Ochronosis / Q000150:complications*; D010003:Osteoarthritis / Q000209:etiology*