PET image (obtained 1 hr after administration of 5.2 mCi of 18F-FDG) showing focus of uptake in the left lung lower zone, corresponding to the lung primary. Uptake is noted in the mediastinal lymphnodes also. The liver is appearing enlarged with markedly increased uptake, s/o hypermetabolic liver/hot liver. The uptake in the brain and collecting system are noted, even though to a lesser extent. FDG, fluorodeoxyglucose; PET, positron emission tomography.