患儿，5岁，低热、颈痛数月，检査颈部 旋转受限。X线侧位片可见寰椎向前脱位， 咽后壁增宽。其诊断最大可能为

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30115' and id < 2437716 and id<>'2437716' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30115' and id > 2437716 and id<>'2437716' order by id asc limit 5