{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,5]],"date-time":"2025-11-05T11:02:44Z","timestamp":1762340564900,"version":"3.44.0"},"reference-count":8,"publisher":"BMJ","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["BMJ Case Reports"],"abstract":"<jats:title\/>\n               <jats:p>Arnold-Chiari malformations are a group of congenital or acquired defects associated with the displacement of cerebellar tonsils into the spinal canal. First described by Chiari (1891), this has various grades of severity and involves various parts of neuraxis, for example, cerebellum and its outputs, neuro-otological system, lower cranial nerves, spinal sensory and motor pathways. The symptomatology of Arnold-Chiari malformations may mimic multiple sclerosis, primary headache syndromes, spinal tumours and benign intracranial hypertension. We highlighted a case of Chiari type I malformation, who presented with posterolateral ataxia associated with significant vitamin B<jats:sub>12<\/jats:sub> deficiency. The patient was supplemented with vitamin B<jats:sub>12<\/jats:sub> injections and showed remarkable improvement at follow-up after 3\u2005months.<\/jats:p>","DOI":"10.1136\/bcr-03-2012-6138","type":"journal-article","created":{"date-parts":[[2012,7,9]],"date-time":"2012-07-09T11:39:40Z","timestamp":1341833980000},"page":"bcr0320126138","source":"Crossref","is-referenced-by-count":2,"title":["Unusual association of Arnold-Chiari malformation and vitamin B<sub>12<\/sub> deficiency"],"prefix":"10.1136","volume":"2012","author":[{"given":"Rajesh","family":"Verma","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Heramba Narayan","family":"Praharaj","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2012,7,9]]},"reference":[{"doi-asserted-by":"publisher","key":"2025082707205696000_2012.jul06_1.bcr0320126138.1","DOI":"10.1093\/ageing\/28.4.399"},{"unstructured":"Bejjani GK . What do tonsillar herniation and idiopathic intracranial hypertension have in common? Successful management of recurrent Chiari malformation with CSF diversion. Transactions of the 12th World Congress of Neurosurgery; \u00a0Sydney, Australia: WFNS, 2001:16\u201321.","key":"2025082707205696000_2012.jul06_1.bcr0320126138.2"},{"doi-asserted-by":"publisher","key":"2025082707205696000_2012.jul06_1.bcr0320126138.3","DOI":"10.1056\/NEJM198806303182604"},{"doi-asserted-by":"publisher","key":"2025082707205696000_2012.jul06_1.bcr0320126138.4","DOI":"10.1097\/00006123-199905000-00042"},{"doi-asserted-by":"publisher","key":"2025082707205696000_2012.jul06_1.bcr0320126138.5","DOI":"10.1159\/000120586"},{"key":"2025082707205696000_2012.jul06_1.bcr0320126138.6","doi-asserted-by":"crossref","first-page":"1197","DOI":"10.1111\/j.1532-5415.1992.tb03641.x","article-title":"High prevalence of cobalamin deficiency in elderly outpatients","volume":"40","author":"Pennypacker","year":"1992","journal-title":"J Am Geriatr Soc"},{"key":"2025082707205696000_2012.jul06_1.bcr0320126138.7","first-page":"57","article-title":"Vitamin B12 deficiency neurological syndromes: a clinical, MRI and electrodiagnostic study","volume":"43","author":"Misra","year":"2003","journal-title":"Electromyogr Clin Neurophysiol"},{"doi-asserted-by":"publisher","key":"2025082707205696000_2012.jul06_1.bcr0320126138.8","DOI":"10.1038\/sj.sc.3101675"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-03-2012-6138","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T14:21:06Z","timestamp":1756304466000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-03-2012-6138"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,7,9]]},"references-count":8,"alternative-id":["10.1136\/bcr-03-2012-6138"],"URL":"https:\/\/doi.org\/10.1136\/bcr-03-2012-6138","relation":{},"ISSN":["1757-790X"],"issn-type":[{"type":"electronic","value":"1757-790X"}],"subject":[],"published":{"date-parts":[[2012,7,9]]}}}