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VAD related multiple infarction in the posterior circulation was revealed. The congenital posterior arch anomaly of the atlas, along with instability of the atlantoaxial joint, were discovered accidentally during follow-up. This is the first case of ischemic stroke related to atlantal posterior arch aplasia and atlantoaxial instability. Although rare, it reminds us that investigation of the craniovertebral junction should be considered when stroke occurs in young patients.<\/jats:p>","DOI":"10.1136\/neurintsurg-2016-012731.rep","type":"journal-article","created":{"date-parts":[[2017,1,12]],"date-time":"2017-01-12T22:00:42Z","timestamp":1484258442000},"page":"e27-e27","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Republished: Congenital anomaly of the posterior arch of the atlas: a rare risk factor for posterior circulation stroke"],"prefix":"10.1136","volume":"9","author":[{"given":"Zhi-yuan","family":"Ouyang","sequence":"first","affiliation":[{"name":"The Second Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Min-jian","family":"Qiu","sequence":"additional","affiliation":[{"name":"The Second Affiliated Hospital of Zhejiang University, School of 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