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  • Title: Comparison of 18F-FDG PET/CT, MRI and SPECT in the diagnosis of local residual/recurrent nasopharyngeal carcinoma: A meta-analysis.
    Author: Wei J, Pei S, Zhu X.
    Journal: Oral Oncol; 2016 Jan; 52():11-7. PubMed ID: 26547126.
    Abstract:
    The objective of this study was to assess the overall diagnostic value of MRI, SPECT and 18F-FDG PET/CT in detecting local NPC residual/recurrence with a meta-analysis. We performed a systematic review with meta-analyses to compare the diagnostic performance of nuclear magnetic resonance Imaging (MRI), single photon emission computed tomography (SPECT) and 18-fluoro-2-deoxyglucose positron emission tomography (18F-FDG PET/CT) as imaging modalities for the detection of local residual or recurrent nasopharyngeal carcinoma (NPC). MEDLINE, EMBASE and publisher databases were searched in December 2014. Methodological quality was assessed using the Quality Assessment of Diagnostic Accuracy Studies (QUADAS) tool. Pooled estimation and subgroup analysis data were obtained by statistical analysis. Seventeen studies were included in the meta-analysis. The pooled sensitivity estimates for 18F-FDGPET/CT (90%) and SPECT (85%) were not significantly higher than MRI (77%) (p=0.096 and 0.164, respectively). The pooled specificity estimates for 18F-FDGPET/CT (93%) and SPECT (81%) were significantly higher than MRI (76%) (p=0.033 and 0.042, respectively). The pooled DOR (Diagnostic odds ratio) estimates for 18F-FDGPET/CT (73.27) were significantly higher than MRI (12.09) (p=0.019) while the pooled DOR estimates for SPECT (78.69) were not significantly higher than MRI (12.09) (p=0.872). For 18F-FDGPET/CT, there were no significant differences between PET-CT and PET on all of the variables including sensitivity, specificity, PLR (Positive likelihood ratio), NLR (Negative likelihood ratio) and DOR (P>0.05). For SPECT, there were no significant differences between 201TI-SPECT and MIBI-SPECT on all of the variables including sensitivity, specificity, PLR, NLR and DOR (P>0.05). Both 18F-FDGPET/CT and SPECT are very accurate for the detection of local residual or recurrent NPC, they are superior to MRI in distinguishing recurrent NPC from fibrosis or scar tissue after RT in irradiated fields with distortion of normal architecture. For 18F-FDGPET/CT, the diagnostic accuracy PET/CT was not significantly different than that of PET alone. For SPECT, 201TI-SPECT and MIBI-SPECT have the same diagnostic accuracy.
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