Presentation
Surveillance scan for history of anaplastic large cell lymphoma.
Patient Data
Age: 16 years
Gender: Male
From the case:
Extensive brown fat activation (18F-FDG PET-CT)
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AC MIP: Extensive, intense uptake in the cervical, axillary, thoracic paraspinal, and retroperitoneal soft tissues.
Axial fused PET-CT and CT: In the supraclavicular region there is intense FDG uptake corresponding with regions of fat on CT.
Case Discussion
Key points:
- notice the classic location for brown fat activation, including intensity and distribution
- correlate FDG uptake with the CT findings, brown fat activation leads to uptake solely in areas of fat on CT.
- use caution when interpreting PET-CT with brown fat activation, consider having the patient return with brown fat activation precautions
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