{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,25]],"date-time":"2026-06-25T22:53:19Z","timestamp":1782427999923,"version":"3.54.5"},"reference-count":21,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2022,10,21]],"date-time":"2022-10-21T00:00:00Z","timestamp":1666310400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Neurol."],"abstract":"<jats:p>We report two rare cases. One involved acute calcific retropharyngeal tendinitis, an inflammatory condition of the longus colli tendon triggered by the deposition of calcium hydroxyapatite crystals. The other involved crowned dens syndrome, caused by pseudogout of the atlantoaxial junction following deposition of calcium pyrophosphate dehydrate or calcium hydroxyapatite. Although these two diseases involve different mechanisms, the common symptoms of neck pain and fever resemble those of meningitis. Accurate diagnosis can thus be difficult without background knowledge of these conditions. Cerebrospinal fluid examination and cervical computed tomography are useful for distinguishing these pathologies from meningitis.<\/jats:p>","DOI":"10.3389\/fneur.2022.946222","type":"journal-article","created":{"date-parts":[[2022,10,21]],"date-time":"2022-10-21T13:51:46Z","timestamp":1666360306000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":6,"title":["Two rare diseases, acute calcific retropharyngeal tendinitis, and crowned dens syndrome, mimicking meningitis: A case report"],"prefix":"10.3389","volume":"13","author":[{"given":"Eriko","family":"Igami","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiro","family":"Fukae","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazo","family":"Kanazawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Atsuhito","family":"Fuse","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Asuka","family":"Nakajima","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroto","family":"Eguchi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nobutaka","family":"Hattori","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yasushi","family":"Shimo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2022,10,21]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"3036","DOI":"10.1016\/S0140-6736(16)30654-7","article-title":"Acute bacterial meningitis in adults","volume":"388","author":"McGill","year":"2016","journal-title":"Lancet."},{"key":"B2","doi-asserted-by":"publisher","first-page":"176","DOI":"10.1016\/j.jns.2019.01.050","article-title":"Viral (aseptic) meningitis: a review","volume":"398","author":"Wright","year":"2019","journal-title":"J Neurol Sci."},{"key":"B3","doi-asserted-by":"publisher","first-page":"967","DOI":"10.1634\/theoncologist.2008-0138","article-title":"Neoplastic meningitis","volume":"13","author":"Chamberlain","year":"2008","journal-title":"Oncologist."},{"key":"B4","doi-asserted-by":"publisher","first-page":"252","DOI":"10.1111\/fcp.12349","article-title":"Drug-induced aseptic meningitis: a mini-review","volume":"32","author":"Yelehe-Okouma","year":"2018","journal-title":"Fundam Clin Pharmacol."},{"key":"B5","doi-asserted-by":"publisher","first-page":"93","DOI":"10.1016\/j.ncl.2021.08.007","article-title":"Autoimmune meningitis and encephalitis","volume":"40","author":"Richie","year":"2022","journal-title":"Neurol Clin."},{"key":"B6","doi-asserted-by":"publisher","first-page":"1849","DOI":"10.1056\/NEJMoa040845","article-title":"Clinical features and prognostic factors in adults with bacterial meningitis","volume":"351","author":"van de Beek","year":"2004","journal-title":"N Engl J Med."},{"key":"B7","doi-asserted-by":"crossref","first-page":"1753","DOI":"10.2106\/00004623-196446080-00010","article-title":"Acute cervical pain associated with a retropharyngeal calcium deposit. 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