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Answer: 4. FDG-PET CT shows increased metabolic activity in the subaortic space and activity in the left chest wall, most likely related to the recent thoracotomy
FDG-PET CT shows foci of marked tracer utilization corresponding to the abnormal soft tissue seen on the thoracic CT, found to represent neuroendocrine tumor, as well as additional foci of elevated glucose utilization localizable to the left chest wall. Note that the abnormal region of the left chest wall on FDG-PET CT shows no abnormal soft tissue or destructive change on the recent thoracic CT (Figure 2); rather, rib irregularity is visible on the top image to the left in Figure 3, correlating with the lateral area of chest wall tracer accumulation. The left chest wall findings are related to the recent left anterior medastinotomy and resolved on follow up re-staging FDG-PET CT.
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