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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\/bcr-2016-012731","type":"journal-article","created":{"date-parts":[[2017,1,4]],"date-time":"2017-01-04T16:15:00Z","timestamp":1483546500000},"page":"bcr2016012731","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Congenital anomaly of the posterior arch of the atlas: a rare risk factor for posterior circulation stroke"],"prefix":"10.1136","volume":"2017","author":[{"given":"Zhi-yuan","family":"Ouyang","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Min-jian","family":"Qiu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhe","family":"Zhao","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiao-bing","family":"Wu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lu-sha","family":"Tong","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2017,1,4]]},"reference":[{"key":"2025042702140066000_2017.jan04_1.bcr2016012731.1","doi-asserted-by":"crossref","first-page":"206","DOI":"10.4103\/0974-8237.167883","article-title":"Spontaneous vertebral artery dissection: posterior circulation stroke","volume":"6","author":"Deshmukh","year":"2015","journal-title":"J Craniovertebr Junction Spine"},{"key":"2025042702140066000_2017.jan04_1.bcr2016012731.2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1747-4949.2012.00912.x"},{"key":"2025042702140066000_2017.jan04_1.bcr2016012731.3","doi-asserted-by":"crossref","first-page":"603","DOI":"10.1097\/HCO.0000000000000224","article-title":"Cervicocerebral artery dissection","volume":"30","author":"Ortiz","year":"2015","journal-title":"Curr Opin Cardiol"},{"key":"2025042702140066000_2017.jan04_1.bcr2016012731.4","doi-asserted-by":"crossref","first-page":"2819","DOI":"10.1016\/j.jstrokecerebrovasdis.2014.07.003","article-title":"Profile of patients with craniovertebral junction anomalies with posterior circulation strokes","volume":"23","author":"Kulkarni","year":"2014","journal-title":"J Stroke Cerebrovasc Dis"},{"key":"2025042702140066000_2017.jan04_1.bcr2016012731.5","first-page":"249","article-title":"Congenital defects of the posterior arch of the atlas: a report of seven cases including an affected mother and son","volume":"15","author":"Currarino","year":"1994","journal-title":"AJNR Am J Neuroradiol"},{"key":"2025042702140066000_2017.jan04_1.bcr2016012731.6","doi-asserted-by":"publisher","DOI":"10.1136\/jnnp.54.10.863"},{"key":"2025042702140066000_2017.jan04_1.bcr2016012731.7","doi-asserted-by":"publisher","DOI":"10.1136\/svn-2015-000005"},{"key":"2025042702140066000_2017.jan04_1.bcr2016012731.8","first-page":"1167","article-title":"Partial aplasia of the posterior arch of the atlas with an isolated posterior arch remnant: Findings in three cases","volume":"21","author":"Sharma","year":"2000","journal-title":"AJNR Am J Neuroradiol"},{"key":"2025042702140066000_2017.jan04_1.bcr2016012731.9","doi-asserted-by":"crossref","first-page":"435","DOI":"10.1016\/B978-0-7020-4086-3.00028-X","article-title":"Neurologic complications of craniovertebral dislocation","volume":"119","author":"de Carvalho","year":"2014","journal-title":"Handb Clin Neurol"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2016-012731","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,4,27]],"date-time":"2025-04-27T09:14:08Z","timestamp":1745745248000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2016-012731"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,1,4]]},"references-count":9,"alternative-id":["10.1136\/bcr-2016-012731"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2016-012731","relation":{},"ISSN":["1757-790X"],"issn-type":[{"type":"electronic","value":"1757-790X"}],"subject":[],"published":{"date-parts":[[2017,1,4]]}}}