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In this case, a 42-year-old man with cerebellar medulloblastoma underwent surgery and radiotherapy and had FDG uptake in 3 separate locations after 3\u2009months. The findings indicated leptomeningeal metastases, confirmed by MRI. This highlights the role of <jats:sup>18<\/jats:sup>F-FDG PET\/CT in detecting leptomeningeal disease postmedulloblastoma treatment.<\/jats:p>","DOI":"10.1097\/rlu.0000000000005693","type":"journal-article","created":{"date-parts":[[2025,1,24]],"date-time":"2025-01-24T22:00:45Z","timestamp":1737756045000},"page":"e376-e378","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":1,"title":["Rare Neoplastic Meningitis in Cerebellar Medulloblastoma Detected by PET\/CT"],"prefix":"10.1097","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-4126-7778","authenticated-orcid":false,"given":"Merve Nur","family":"Acar Tayyar","sequence":"first","affiliation":[{"name":"Department of Nuclear Medicine, University of Health Sciences, Prof. Dr. Cemil Ta\u015fcio\u011flu City Hospital, Istanbul, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M\u00fcge 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