Figure 15c. Laryngeal carcinoma in an 80-year-old man who underwent FDG PET-CT to characterize a new pulmonary nodule in the left upper lobe. (a) Axial fused FDG PET-CT image of the pulmonary nodule shows intense hypermetabolism (arrow), which was due to metastatic squamous cell carcinoma at wedge resection. (b) Axial CT image of the neck shows nonspecific bilateral thyroid nodules (solid arrows) with foci of calcification (open arrows), which were incidentally noted and are suggestive of multinodular goiter. (c) Corresponding fused FDG PET-CT image shows intense hypermetabolism in the left-sided thyroid nodule (curved arrow). Total thyroidectomy revealed left-sided papillary thyroid carcinoma and right-sided multinodular goiter. Open arrows = foci of calcification.