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KMID : 1103720120660010083
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Journal of the Korean Society of Radiology
2012 Volume.66 No. 1 p.83 ~ p.92
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Supraclavicular Lymph Node Metastasis from Various Malignancies: Assessment with 18F-Fluorodeoxyglucose Positron Emission Tomography/CT, Contrast-Enhanced CT and Ultrasound
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Ryu Eun-Bi
Oh Kyung-Seung
Jeong Kyung-Soon
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Abstract
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Purpose: The purpose of this study is to compare the usefulness of 18F-fluorodeoxyglucose positron emission tomography (18F-FDG PET)/CT, contrast-enhanced CT and ultrasound (US) for diagnosing metastatic supraclavicular lymph nodes.
Materials and Methods : This study included 53 supraclavicular lymph nodes of 48 consecutive patients with various malignancies observed on 18F-FDG PET/CT, contrast-enhanced CT and US. Detection of supraclavicular lymph nodes was determined by 18F-FDG PET/CT where uptake was greater than that of surrounding tissue and contrast-enhanced CT with a node short-axis diameter of 5 mm or more. On US, we classified the supraclavicular lymph node as benign or malignant by sonographic criteria. The diagnostic values of these modalities were compared in the detection of metastatic supraclavicular lymph nodes.
Results: Metastatic supraclavicular lymph nodes were diagnosed cytologically in 44 (83%) of 53 lesions. In the detection of metastatic supraclavicular lymph nodes, the diagnostic accuracies of 18F-FDG PET/CT, contrast-enhanced CT, and US were 92%, 89%, and 91%, respectively. The specificity (67%) and negative predictive value (86%) of 18F-FDG PET/CT were higher than those of contrast-enhanced CT and US.
Conclusion: 18F-FDG PET/CT is more useful for detecting and characterizing supraclavicular lymph nodes in patients with cancer, because of its high specificity and negative predictive value.
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KEYWORD
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Lymph Node, Metastasis, Positron Emission Tomography/CT, Malignancy
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