Brown fat: atypical locations and appearances encountered in PET/CT.
OBJECTIVE
The purpose of this article is to review the physiology and describe the typical and atypical presentations of brown fat on (18)F-FDG PET.


CONCLUSIONS
The presence of brown fat on FDG PET has the potential to lead to misinterpretation and unneeded invasive tests, which can be avoided by using measures such as ensuring the patient is warm, reducing FDG uptake in brown fat before the procedure, and correlating PET uptake to a specific anatomic location with PET/CT fusion imaging.
Paidisetty
Sanjay
S
Department of Radiology, Hillman Cancer Center, University of Pittsburgh, 5115 Centre Ave., Pittsburgh, PA 15232, USA.
Blodgett
Todd M
TM
D002001:Adipose Tissue, Brown / Q000000981:diagnostic imaging* / Q000378:metabolism; D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D019788:Fluorodeoxyglucose F18 / Q000493:pharmacokinetics; D006801:Humans; D008198:Lymph Nodes / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000378:metabolism; D009333:Neck; D009369:Neoplasms / Q000175:diagnosis / Q000378:metabolism; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals / Q000493:pharmacokinetics; D014057:Tomography, X-Ray Computed
D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18