Figure 5.

Coronal reformatted (A) and axial (B) CT-images in lung window setting in a 70-year-old man who presented with a large multinodular thyroid goiter show a cystic airspace lesion in the right upper lobe with two solid exophytic nodules, type I lesions according to the classification system of Mascalchi. Both nodules have a spiculated solid morphology with a larger nodule at the inferior aspect (A) and smaller nodule abutting the cranial part of the cystic airspace (B). 18F-FDG-PET reformation in the coronal plane (C) clearly depicts both nodules in the same image, showing a high uptake. Histopathologic examination after robot-assisted right upper lobectomy showed a 3.1 and 1.8 cm poorly differentiated squamous cell carcinoma. 18F-FDG-PET, 18F-fluorodeoxyglucose positron emission tomography.