Fig. 1

Computed tomography and 18F-fluorodeoxyglucose positron emission tomography findings. a A solid nodule (maximum diameter, 2 cm) located centrally in the right lower lobe. b A solid nodule (maximum diameter, 3 cm) located centrally in the left upper lobe. c Maximum standardized uptake value of 8.3 corresponding to the nodule in the right lower lobe. d Maximum standardized uptake value of 5.7 corresponding to the nodule in the left upper lobe