期刊
ANNALS OF THE RHEUMATIC DISEASES
卷 77, 期 1, 页码 70-77出版社
BMJ PUBLISHING GROUP
DOI: 10.1136/annrheumdis-2017-211687
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资金
- Deutsche Forschungsgemeinschaft [SPP1468-IMMUNOBONE, CRC1181]
- Bundesministerium fur Bildung und Forschung
- TEAM project of the European Union
- project BTCure - Innovative Medicines Initiative
Background Fever of unknown origin (FUO) and inflammation of unknown origin (IUO) are diagnostically challenging conditions. Diagnosis of underlying disease may be improved by F-18-fluorodesoxyglucose positron emission tomography (F-18-FDG-PET). Methods Prospective study to test diagnostic utility of F-18-FDG-PET/CT in a large cohort of patients with FUO or IUO and to define parameters that increase the likelihood of diagnostic F-18-FDG-PET/CT. Patients with FUO or IUO received F-18-FDG-PET/CT scanning in addition to standard diagnostic work-up. F-18-FDG-PET/CT results were classified as helpful or non-helpful in establishing final diagnosis. Binary logistic regression was used to identify clinical parameters associated with a diagnostic F-18-FDG-PET/CT. Results 240 patients were enrolled, 72 with FUO, 142 with IUO and 26 had FUO or IUO previously (exFUO/IUO). Diagnosis was established in 190 patients (79.2%). The leading diagnoses were adult-onset Still's disease (15.3%) in the FUO group, large vessel vasculitis (21.1%) and polymyalgia rheumatica (18.3%) in the IUO group and IgG 4-related disease (15.4%) in the exFUO/IUO group. In 136 patients (56.7% of all patients and 71.6% of patients with a diagnosis), F-18-FDG-PET/CT was positive and helpful in finding the diagnosis. Predictive markers for a diagnostic F-18-FDG-PET/CT were age over 50 years (p=0.019), C-reactive protein (CRP) level over 30 mg/L (p=0.002) and absence of fever (p=0.001). Conclusion F-18-FDG-PET/CT scanning is helpful in ascertaining the correct diagnosis in more than 50% of the cases presenting with FUO and IUO. Absence of intermittent fever, higher age and elevated CRP level increase the likelihood for a diagnostic F-18-FDG-PET/CT.
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