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Objective The aim of this study is to investigate the predictive value of metabolic parameters measured by 18F-FDG PET/CT for lymph node metastases in patients with clinical stage ⅠA-ⅡB NSCLC.Methods A retrospective study enrolled 92 patients with surgically re-sected NSCLC who underwent 18F-FDG PET/CT at our PET/CT center at least 4 weeks before the surgical resec-tion.