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  • Title: Fever of unknown origin: a value of (18)F-FDG-PET/CT with integrated full diagnostic isotropic CT imaging.
    Author: Ferda J, Ferdová E, Záhlava J, Matejovic M, Kreuzberg B.
    Journal: Eur J Radiol; 2010 Mar; 73(3):518-25. PubMed ID: 19201122.
    Abstract:
    AIM: The aim of presented work is to evaluate the clinical value of (18)F-FDG-PET/CT in patients with fever of unknown origin (FUO) and to compare PET/CT finding with the results of the following investigation. MATERIAL AND METHOD: 48 patients (24 men, 24 women, mean age 57.6 years with range 15-89 years) underwent (18)F-FDG-PET/CT due to the fever of unknown origin. All examinations were performed using complex PET/CT protocol combined PET and whole diagnostic contrast enhanced CT with sub-millimeter spatial resolution (except patient with history of iodine hypersensitivity or sever renal impairment). CT data contained diagnostic images reconstructed with soft tissue and high-resolution algorithm. PET/CT finding were compared with results of biopsies, immunology, microbiology or autopsy. RESULTS: The cause of FUO was explained according to the PET/CT findings and followed investigations in 44 of 48 cases-18 cases of microbial infections, nine cases of autoimmune inflammations, four cases of non-infectious granulomatous diseases, eight cases of malignancies and five cases of proved immunity disorders were found. In 46 cases, the PET/CT interpretation was correct. Only in one case, the cause was overlooked and the uptake in atherosclerotic changes of arteries was misinterpreted as vasculitis in the other. The reached sensitivity was 97% (43/44), and specificity 75% (3/4) respectively. CONCLUSION: In patients with fever of unknown origin, (18)F-FDG-PET/CT might enable the detection of its cause.
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