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http://dx.doi.org/10.5090/kjtcs.2010.43.5.506

The Ability of FDG Uptake Ratio and Glut-1 Expression to Predict Mediastinal Lymph Node Metastasis in Resected Non-small Cell Lung Cancer  

Cho, Suk-Ki (Department of Thoracic and Cardiovascular Surgery, School of Medicine, Kyungpook National University)
Lee, Eung-Bae (Department of Thoracic and Cardiovascular Surgery, School of Medicine, Kyungpook National University)
Publication Information
Journal of Chest Surgery / v.43, no.5, 2010 , pp. 506-512 More about this Journal
Abstract
Background: This study was designed to evaluate the FDG uptake ratio of mediastinal node and primary tumors using integrated PET/CT imaging combined with Glut-1 expression of the primary tumor in order to predict the N2 status more accurately in NSCLC patients. Material and Method: Patients who underwent integrated PET/CT scanning with a detectable mSUV for both primary tumors and mediastinal lymph nodes were eligible for this study. The FDG uptake ratio between the mediastinal node and the primary tumor was calculated. Result: The average mSUV of primary tumors and mediastinal nodes were, respectively, $7.4{\pm}2.2$ and $4.2{\pm}2.2$ in N2-positive patients and $7.6{\pm}3.7$ and $2.8{\pm}6.9$ in N2-negative patients. The mean FDG uptake ratio of mediastinal node to primary tumor were $0.58{\pm}0.23$ for malignant N2 lymph nodes and $0.45{\pm}0.20$ for benign lymph nodes (p<0.05). Models which combined Glut-1 expression with an FDG ratio have better diagnostic power than models that use the FDG uptake ratio alone. Conclusion: In some patients with a previous history of pulmonary tuberculosis or other inflammatory lung diseases, an FDG uptake ratio combined with Glut-1 expression may be useful in diagnosing mediastinal node metastasis more exactly.
Keywords
Positron emission tomography (PET); Lung neoplasm; Mediastinal lymph node; Neoplasm marker;
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