<prompt> Subluxation of atlanto-occipital joint is seen in all except:GoutOdontoid dysgenesisRheumatoid ahritisAnkylosing spondylitis  <response>: Gout very rarely causes cranioveebral anomalies CRANIOVEEBRAL CV JUNCTION ANOMALIES: Subluxation of BASE OF SKULL C1 C2 Causes are: 