Preliminary data indicate that positron emission tomography (PET) foll
owing injection of fluorodeoxyglucose F18 (FDG) is sensitive and speci
fic for detecting malignant cells in chest tumors and mediastinal lymp
h nodes. We report a case of non-small cell lung cancer metastatic to
clinically normal scalene lymph nodes that was correctly staged by FDG
-PET.