This case illustrates focal lung lesion in the right lower lobe with mixed solid and ground glass components and low or non-measurable metabolic activity on PET. The patient was offered a CT-guided lung biopsy that confirmed a lung adenocarcinoma, with further resection showing a lepidic predominant lung adenocarcinoma (T2a N0 M0). Other tiny ground-glass nodules in the upper lobes, although non-specific, are suspicious for pre-invasive lung tumors and will be followed-up on imaging.