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The aim of this study was to assess the diagnostic value of epidermal growth factor (EGF),CA125,and CA153 in BALF of lung cancer.79 patients with suspected lung cancer were enrolled.All the patients undergo fiberscopic examination and bronchoalveolar lavage fluid (BALF) samples were collected during the examination.Levels of EGF,CA125,and CA153 in BALF were determined by commercially available test kits.