title: [Study of patients with prolonged fever with (18)F-FDG PET/CT].
abstract: OBJECTIVE
  To review the findings on (18)F-FDG PET-CT in patients with fever of unknown origin lasting more than 7 days.
  
  
  METHODS
  This retrospective descriptive observational study included 93 (18)F-FDG PET-CT studies to detect a fever-causing focus done at three nuclear medicine centers from October 2006 through February 2014. A nuclear medicine specialist and a radiologist reviewed the images for foci of pathological uptake; another specialist's opinion resolved discrepancies. The findings on (18)F-FDG PET-CT studies were checked against clinical and/or histological findings.
  
  
  RESULTS
  Abnormal (18)F-FDG uptake on PET-CT that could explain the cause of the fever was found in 52 (56%) of the 93 studies, and the cause of the fever was confirmed in 50 of these 52 studies. In the 50 cases in which the cause of the fever was confirmed, infection was the most common cause (54%), followed by noninfectious inflammatory disease (28%) and tumors (18%).
  
  
  CONCLUSIONS
  (18)F-FDG PET-CT is useful in diagnosing the cause of prolonged febrile illness, so it might be practical to use it earlier in the diagnostic process.
authors: Unidad PET Esplugues CETIR-ERESA, Barcelona, España. Electronic address: mmoragas@cetir.es.
authors: M
authors: M
authors: Moragas
authors: Servicio de Medicina Nuclear ERESA, Hospital General Universitario de Valencia, España.
authors: M Puig
authors: MP
authors: Cozar
authors: Unidad Teknon CETIR-ERESA, Barcelona, España.
authors: M
authors: M
authors: Buxeda
authors: Unidad PET Esplugues CETIR-ERESA, Barcelona, España.
authors: M
authors: M
authors: Soler
authors: Unidad PET Esplugues CETIR-ERESA, Barcelona, España.
authors: E
authors: E
authors: Riera
authors: Unidad PET Esplugues CETIR-ERESA, Barcelona, España.
authors: J R
authors: JR
authors: García
mesh_terms: D005334:Fever / Q000000981:diagnostic imaging*; D019788:Fluorodeoxyglucose F18; D006801:Humans; D000072078:Positron Emission Tomography Computed Tomography; D019275:Radiopharmaceuticals; D012189:Retrospective Studies
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18
keywords: Computed tomography; Fever of unknown origin; Fiebre de origen desconocido; Fluorodeoxyglucose (18 F); Fluorodesoxiglucosa F18; Positron emission tomography; Tomografía computarizada; Tomografía por emisión de positrones