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This is a case report of a 32-year-old female inpatient at a psychiatric hospital with a long-standing history of congenital hydrocephalus, cerebral palsy and organic delusional disorder who developed an iatrogenic cerebral abscess after insertion of an implantable intracranial pressure monitoring device. After receiving treatment of 6\u2009weeks of intravenous meropenem the patient\u2019s mental condition rapidly improved, she became stable and euthymic and was discharged home. The patient has since had no delusions or hallucinations and is living independently at home.<\/jats:p>","DOI":"10.1136\/bcr-2019-232394","type":"journal-article","created":{"date-parts":[[2023,3,14]],"date-time":"2023-03-14T00:11:22Z","timestamp":1678752682000},"page":"e232394","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Iatrogenic cerebral abscess leading to resolution of severe delusional disorder"],"prefix":"10.1136","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9153-3077","authenticated-orcid":false,"given":"Conor SN","family":"Gillespie","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Walton Centre for Neurology and Neurosurgery, Liverpool, UK"},{"name":"School of Medicine, University of Liverpool, Liverpool, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Catherine J","family":"McMahon","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Walton Centre for Neurology and Neurosurgery, Liverpool, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2019,12,2]]},"reference":[{"key":"2025082623003205000_12.12.e232394.1","doi-asserted-by":"crossref","first-page":"381","DOI":"10.1016\/j.ccell.2013.04.001","article-title":"Brain abscess","volume":"25","author":"Slazinski","year":"2013","journal-title":"Crit Care Nurs Clin North Am"},{"key":"2025082623003205000_12.12.e232394.2","doi-asserted-by":"crossref","first-page":"8","DOI":"10.1016\/j.jocn.2016.12.035","article-title":"Microbiology and treatment of brain abscess","volume":"38","author":"Brook","year":"2017","journal-title":"J Clin Neurosci"},{"key":"2025082623003205000_12.12.e232394.3","doi-asserted-by":"crossref","first-page":"S67","DOI":"10.4103\/0976-3147.116472","article-title":"Brain abscess: current management","volume":"4","author":"Alvis Miranda","year":"2013","journal-title":"J Neurosci Rural Pract"},{"key":"2025082623003205000_12.12.e232394.4","doi-asserted-by":"publisher","DOI":"10.1007\/s13311-011-0086-5"},{"key":"2025082623003205000_12.12.e232394.5","doi-asserted-by":"crossref","first-page":"129","DOI":"10.1097\/QCO.0000000000000334","article-title":"Epidemiology, diagnosis, and treatment of brain abscesses","volume":"30","author":"Brouwer","year":"2017","journal-title":"Curr Opin Infect Dis"},{"key":"2025082623003205000_12.12.e232394.6","doi-asserted-by":"publisher","DOI":"10.1177\/1941874414540684"},{"key":"2025082623003205000_12.12.e232394.7","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijid.2005.04.003"},{"key":"2025082623003205000_12.12.e232394.8","doi-asserted-by":"crossref","unstructured":"Tayfun H . 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