PMC5933485_01
Conventional CT, PET, and PET/CT fusion images (pre). (A) Conventional CT in axial section at the level of the pancreas showing an atrophic pancreatic tail. No discernible mass lesion present. (B) PET image in coronal section, displaying normal physiological uptake; note that no abnormal FDG-avid focus is present at the pancreatic region. (C) PET/CT fusion image (axial section), also at the level of the pancreas showing no abnormal uptake at the pancreatic region. Note the incidental finding of left simple renal cyst (arrow). CT, computed tomography; FDG, fluorodeoxyglucose; PET, positron emission tomography.
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A serum cancer antigen (CA) 19-9 was ordered, which was elevated at 50.0 U/mL. 18F (fluorine 18)-FDG PET/CT showed no abnormal uptakes (Fig. 1).
Conventional CT, PET, and PET/CT fusion images (post) (A) Conventional CT in axial section at the level of the pancreas showing an atrophic pancreatic tail. No discernible mass lesion present. This is essentially similar to the previous CT study (Fig. 1A). (B) PET image in coronal section, displaying an FDG-avid focus at the region of the pancreas (arrow). Note that this was not present on previous study (Fig. 1B). (C) PET/CT fusion image (axial section), at the level of the pancreas, displaying an FDG-avid focus (arrow) corresponding to the region displayed on the PET image (B).
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CA 19-9. CT showed unchanged findings from the previous scan, however, unexpectedly PET revealed a focal area of increased uptake at the neck of the pancreas (Fig. 2).