18F-FDG PET/CT as a diagnostic tool in patients with extracervical carcinoma of unknown primary site: a literature review |
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Authors: | Moller Anne Kirstine Hundahl Loft Annika Berthelsen Anne Kiil Damgaard Pedersen Karen Graff Jesper Christensen Charlotte Birk Perell Katharina Petersen Bodil Laub Daugaard Gedske |
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Institution: | 1. Departments of aOncology,;2. bNuclear Medicine,;3. cRadiology, and;4. eDepartment of Nuclear Medicine, Hvidovre Hospital, Hvidovre, Denmark;5. dPathology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark |
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Abstract: | Background.Carcinoma of unknown primary (CUP) represents a heterogeneous group of metastatic malignancies for which no primary tumor site can be identified after extensive diagnostic workup. Failure to identify the primary site may negatively influence patient management. The aim of this review was to evaluate 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) as a diagnostic tool in patients with extracervical CUP.Materials and Methods.A comprehensive literature search was performed and four publications were identified (involving 152 patients) evaluating 18F-FDG PET/CT in CUP patients with extracervical metastases. All studies were retrospective and heterogeneous in inclusion criteria, study design, and diagnostic workup prior to 18F-FDG PET/CT.Results.18F-FDG PET/CT detected the primary tumor in 39.5% of patients with extracervical CUP. The lung was the most commonly detected primary tumor site (~50%). The pooled estimates of sensitivity, specificity, and accuracy of 18F-FDG PET/CT in the detection of the primary tumor site were 87%, 88%, and 87.5%, respectively.Conclusions.The present review of currently available data indicates that 18F-FDG PET/CT might contribute to the identification of the primary tumor site in extracervical CUP. However, prospective studies with more uniform inclusion criteria are required to evaluate the exact value of this diagnostic tool. |
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Keywords: | Carcinoma of unknown primary site 18F‐FDG PET/CT Extracervical carcinoma of unknown primary Diagnostic tool |
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