Correct!
5. More than one of the above
No significant tracer uptake is seen in the mediastinum or left supraclavicular zone, which was the patient’s site of lymphoma originally (Figure 1A). Bilateral peribronchial lymph node tracer utilization is again evident and has been present on previous examinations, unchanged. The anterior segment right upper lobe nodule again shows metabolic activity not exceeding mediastinal blood pool.
Figure 9. (A) Enhanced CT (A) and (B) axial 18FDG – PET scan at lymphoma recurrence 5 years following initial diagnosis shows left metabolically active external iliac lymphadenopathy (arrow).
The current thoracic 18FDG – PET (Figure 7) is compared to previous cross-sectional imaging studies (Figure 10).
Figure 10. Comparison of anterior segment nodule size over time. (A and B) Axial (A) and (B) sagittal CT at initial diagnosis of lymphoma nearly 5 years earlier. (C) Axial CT attenuation correction image from 18FDG – PET scan obtained 3 months following initiation of therapy. (D and E) Axial (D) and (E) sagittal CT at restaging 3 years after lymphoma diagnosis (no tracer uptake was seen within the nodule around this time at 18FDG – PET). (F and G) Axial (F) and (F) sagittal CT at restaging 4 years after lymphoma diagnosis (no tracer uptake was seen within the nodule around this time at 18FDG – PET). (H and I) Axial (H) and (I) sagittal CT at restaging nearly 5 years after lymphoma diagnosis (no tracer uptake was seen within the nodule around this time at 18FDG – PET).
Regarding the comparison of the repeat 18FDG – PET (shown in Figure 7) with previous cross-sectional imaging studies (Figure 10) is most accurate? (Click on the correct answer to be directed to the ninth of 12 pages)