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Combined FDG-PET/CT for the detection of unknown primary tumors: systematic review and meta-analysis

Open access
Kwee, Thomas C., Kwee, Robert M.·2009·European Radiology

Abstract

The aim of this study was to systematically review and meta-analyze published data on the diagnostic performance of combined 18F-fluoro-2-deoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) in the detection of primary tumors in patients with cancer of unknown primary (CUP). A systematic search for relevant studies was performed of the PubMed/MEDLINE and Embase databases. Methodological quality of the included studies was assessed. Reported detection rates, sensitivities and specificities were meta-analyzed. Subgroup analyses were performed if results of individual studies were heterogeneous. The 11 included studies, comprising a total sample size of 433 patients with CUP, had moderate methodological quality. Overall primary tumor detection rate, pooled sensitivity and specificity of FDG-PET/CT were 37%, 84% (95% CI 78-88%) and 84% (95% CI 78-89%), respectively. Sensitivity was heterogeneous across studies (P = 0.0001), whereas specificity was homogeneous across studies (P = 0.2114). Completeness of diagnostic workup before FDG-PET/CT, location of metastases of unknown primary, administration of CT contrast agents, type of FDG-PET/CT images evaluated and way of FDG-PET/CT review did not significantly influence diagnostic performance. In conclusion, FDG-PET/CT can be a useful method for unknown primary tumor detection. Future studies are required to prove the assumed advantage of FDG-PET/CT over FDG-PET alone and to further explore causes of heterogeneity.

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Metadata

Authors
Kwee, T. C., & Kwee, R. M.
Venue
European Radiology
Published
2008-10-17
Volume
19
Issue
3
Pages
731-744
ISSN
  • 0938-7994 (ISSN-L)
  • 1432-1084
OpenAlex
W2062915447
Cited by
317
References
26
FWCI
0.55
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Combined FDG-PET/CT for the detection of unknown primary tumors: systematic review and meta-analysis. https://app.cochat.ai/papers/10.1007/s00330-008-1194-4
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Kwee, T. C., & Kwee, R. M. (2009). Combined FDG-PET/CT for the detection of unknown primary tumors: systematic review and meta-analysis. European Radiology. https://doi.org/10.1007/s00330-008-1194-4

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