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The diagnostic process was further impaired (or, perhaps, aided?) by the onset of a COVID-19 outbreak on the ward.<\/jats:p>","DOI":"10.12890\/2022_003107","type":"journal-article","created":{"date-parts":[[2022,1,27]],"date-time":"2022-01-27T03:26:21Z","timestamp":1643253981000},"source":"Crossref","is-referenced-by-count":1,"title":["Primary Central Nervous System Lymphoma with Exclusive Leptomeningeal Involvement: The Diagnostic Challenge of a Rare Presentation of an Uncommon Disease"],"prefix":"10.12890","volume":"9","author":[{"given":"Miguel","family":"Santos","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Centro Hospitalar de Leiria, Leiria, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tatiana","family":"Pires","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Centro Hospitalar de Leiria, Leiria, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ana","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Centro Hospitalar de Leiria, Leiria, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Adriana","family":"Bandeira","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Centro Hospitalar de Leiria, Leiria, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ana","family":"Albuquerque","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Centro Hospitalar de Leiria, Leiria, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fl\u00e1via","family":"Santos","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Centro Hospitalar de Leiria, Leiria, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Miriam","family":"Magalh\u00e3es","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Centro Hospitalar de Leiria, Leiria, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maria Jesus","family":"Banza","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Centro Hospitalar de Leiria, Leiria, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"10397","published-online":{"date-parts":[[2022,1,27]]},"reference":[{"key":"10.12890\/2022_003107_ref1","doi-asserted-by":"crossref","unstructured":"<li>Ostrom QT, Gittleman H, de Blank PM, Finlay JL,Gurney JG,McKean-Cowdin R,et al. 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