• Am. J. Med. · Jul 2024

    Meta Analysis

    The contribution of 18F FDG PET-CT for the investigation of fever of unknown origin and inflammation of unknown origin - systematic review and meta-analysis.

    • Shira Buchrits, Rotem McNeil, Tomer Avni, Danielle Fredman, Dmitri Guz, and Anat Gafter-Gvili.
    • Internal Medicine Department A, Rabin Medical Center, Beilinson Hospital, Petah-Tikva, Israel; Institute of Hematology, Davidoff Cancer Center, Rabin Medical Center, Beilinson Hospital, Petah-Tikva, Israel; Sackler Faculty of Medicine, Tel Aviv University, Israel. Electronic address: shirab2805@gmail.com.
    • Am. J. Med. 2024 Jul 1; 137 (7): 629639629-639.

    BackgroundFever of unknown origin and inflammation of unknown origin are highly challenging diagnostic conditions. The current practice for evaluating patients is to conduct a positron emission tomography-computed tomography (PET-CT) scan as either a first- or a second-line modality. We aimed to assess the contributory effect of PET-CT to the diagnosis and compare it with the contributory effect of CT alone.MethodsWe performed a systematic review and meta-analysis. We included all cohorts that examined the contribution of PET-CT to the investigation of classical fever of unknown origin and inflammation of unknown origin. The primary outcome was the contribution of PET-CT to the final diagnosis. Secondary outcomes were sensitivity and specificity of PET-CT and CT scans, and contribution of a CT scan. We pooled the results of all studies and calculated the pooled contributory effect of PET-CT.ResultThirty-six studies (3516 patients) were included in the systematic review. The pooled contribution of PET-CT was 75.4%. The compiled sensitivity and specificity values for all studies were 85.9% and 59.5%, respectively. Five studies (405 patients) compared between the PET-CT component and the total body CT component. The pooled contribution of a CT scan was 68%. The summed sensitivity and specificity values of a CT scan for all studies were 63.1% and 84.4%, respectively.ConclusionsPET-CT has a contributory effect of 75% for the diagnosis of fever of unknown origin and inflammation of unknown origin. PET-CT had superior sensitivity and inferior specificity vs the CT scan.Copyright © 2024 Elsevier Inc. All rights reserved.

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