PMC4895073_01
47-year-old man with metastatic head and neck cancer. Axial CT at the level of the thyroid cartilage shows that it has been destroyed by a large heterogenous tumor mass on the left.
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Both the mass and associated lymph nodes had markedly increased FDG uptake; in addition, the mass demonstrated central photopenia compatible with necrosis (maximum SUV of the neck mass of 17.0) (Figure 1A, Figure 1B, Figure 1C, Figure 1D). Thoracic imaging revealed intensely increased FDG uptake in the right atrium which correlated with an atrial soft tissue mass (maximum SUV of 10.2) (Figure 1C, Figure 1D, Figure 1E). A right upper lobe lung nodule with increased FDG uptake (maximum SUV of 4.0) was also observed (Figure 1C, Figure 1D).
47-year-old man with metastatic head and neck cancer. PET image corresponding to Figure 1A, Figure 1B, Figure 1C, Figure 1D, Figure 1E A demonstrates peripheral marked FDG uptake (SUV max = 17) with central photopenia secondary to necrosis.
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A left lower lobe peripherally situated parenchymal abnormality with mildly increased FDG activity (maximum SUV of 2.1) was also noted (Figure 2A, Figure 2B, Figure 2C).