{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:20:02Z","timestamp":1760059202554,"version":"build-2065373602"},"reference-count":52,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2025,5,27]],"date-time":"2025-05-27T00:00:00Z","timestamp":1748304000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Universidad Alfonso X El Sabio (UAX)"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Diagnostics"],"abstract":"<jats:p>Background: Manganese (Mn) is an essential trace element for humans. It has been recognized as a potential occupational toxin, but its danger as a toxin in patients under parenteral nutrition is often forgotten. Case Presentation: A 73-year-old man was logged for 210 days in the intensive care unit (ICU), receiving parenteral nutrition (PN) for a month, and was then transferred, first, to the internal medicine ward and, then, to the rehabilitation hospital, and 223 days after discharge from the ICU, he had current disease, chorea-type movements in the head and neck, and left hemibody. Diagnostic tests: The magnetic resonance imaging findings suggested manganese deposits, with a total blood manganese concentration of 34 \u00b5g\u00b7L\u22121 (reference range: less than 13 \u00b5g\u00b7L\u22121). Discussion: Abnormal movements can be caused by manganese poisoning due to parenteral nutrition and are associated with liver failure in the ICU. Our patient showed toxic Mn concentrations in whole blood after 31 days of receiving 300 \u03bcg\u00b7d\u22121 of Mn in PN, a shorter duration than typically reported. Neurotoxicity was observed several months later (223 days). Factors such as liver dysfunction and iron deficiency can modulate neurotoxicity. Age may also be a susceptibility factor due to increased expression of Mn transport proteins. Magnetic resonance imaging (MRI) intensity in the globus pallidus is useful for detecting brain Mn accumulation, but it is not feasible for routine clinical practice. Conclusions: In this case, choreiform movements were attributed to manganese (Mn) accumulation in the basal ganglia. It is essential to monitor patients receiving parenteral nutrition (PN) solutions containing Mn, especially in those who have biomarkers of susceptibility, even if they have not yet shown neurological signs, and routinely measure whole-blood Mn concentrations, iron levels, age, and liver function. If Mn intoxication is suspected, a brain MRI examination should be conducted.<\/jats:p>","DOI":"10.3390\/diagnostics15111346","type":"journal-article","created":{"date-parts":[[2025,5,27]],"date-time":"2025-05-27T05:52:52Z","timestamp":1748325172000},"page":"1346","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Manganese Intoxication Induced by Total Parenteral Nutrition in the Intensive Care Unit: A Case Report"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-6778-6933","authenticated-orcid":false,"given":"Victoria","family":"Seijas-Mart\u00ednez-Echevarr\u00eda","sequence":"first","affiliation":[{"name":"Facultad de Ciencias Biom\u00e9dicas y de la Salud, Universidad Alfonso X el Sabio (UAX), Avenida de la Universidad 1, 28691 Villanueva de la Ca\u00f1ada, Madrid, Spain"},{"name":"Clinical Laboratory, Hospital Universitario Severo Ochoa, Avenida de Orellana s\/n, 28911 Legan\u00e9s, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rita","family":"Mart\u00ednez-Manzanal","sequence":"additional","affiliation":[{"name":"Clinical Laboratory, Hospital Universitario Severo Ochoa, Avenida de Orellana s\/n, 28911 Legan\u00e9s, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ester","family":"Mena-P\u00e9rez","sequence":"additional","affiliation":[{"name":"Facultad de Ciencias Biom\u00e9dicas y de la Salud, Universidad Alfonso X el Sabio (UAX), Avenida de la Universidad 1, 28691 Villanueva de la Ca\u00f1ada, Madrid, Spain"},{"name":"Clinical Laboratory, Hospital Universitario Severo Ochoa, Avenida de Orellana s\/n, 28911 Legan\u00e9s, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pilar","family":"Nu\u00f1ez-Valent\u00edn","sequence":"additional","affiliation":[{"name":"Radiology Service, Hospital Universitario Severo Ochoa, Avenida de Orellana s\/n, 28911 Legan\u00e9s, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3761-421X","authenticated-orcid":false,"given":"Guadalupe","family":"Ruiz-Martin","sequence":"additional","affiliation":[{"name":"Facultad de Ciencias Biom\u00e9dicas y de la Salud, Universidad Alfonso X el Sabio (UAX), Avenida de la Universidad 1, 28691 Villanueva de la Ca\u00f1ada, Madrid, Spain"},{"name":"Clinical Laboratory, Hospital Universitario Severo Ochoa, Avenida de Orellana s\/n, 28911 Legan\u00e9s, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,5,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"369","DOI":"10.1016\/j.pharmthera.2006.09.002","article-title":"Manganese neurotoxicity: A focus on the neonate","volume":"113","author":"Erikson","year":"2007","journal-title":"Pharmacol. 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