title: Crowned dens syndrome diagnosed on ¹⁸F-FDG PET/CT.
abstract: An 87-year-old woman with corticosteroid-resistant polymyalgia rheumatica underwent ¹⁸F-FDG PET/CT for suspected giant cell arteritis or neoplastic disease. FDG uptake in the immediate vicinity of the odontoid process, with a crownlike calcification, was identified on the CT scan on the posterior side of the dens, thus confirming the diagnosis of crowned dens syndrome. Because this rare syndrome is frequently misdiagnosed, nuclear physicians should be aware of the signs and symptoms of this condition, which may call for the use of PET/CT imagery.
authors.affiliation: From the *Centre d'Imagerie Fonctionnelle, Bordeaux; and †CHU Pellegrin, Bordeaux, France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Monet
authors.forename: Richard
authors.initials: R
authors.lastname: Massonnat
authors.forename: Bertrand
authors.initials: B
authors.lastname: Merino
authors.forename: Annalisa
authors.initials: A
authors.lastname: Riviere
authors.forename: Christophe
authors.initials: C
authors.lastname: Richez
mesh_terms: D000369:Aged, 80 and over; D002805:Chondrocalcinosis / Q000000981:diagnostic imaging*; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D009809:Odontoid Process / Q000000981:diagnostic imaging; D049268:Positron-Emission Tomography / Q000379:methods; D019275:Radiopharmaceuticals; D013577:Syndrome; D014057:Tomography, X-Ray Computed / Q000379:methods
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18