Nucl Med Mol Imaging.  2018 Feb;52(1):82-84. 10.1007/s13139-016-0454-5.

Transiently Altered Distribution of F-18 FDG in a Patient with Subacute Thyroiditis

• Kim MH
• Kim DW
• Park SA
• Kim CG

• KMID: 2407307
• DOI: http://doi.org/10.1007/s13139-016-0454-5

Abstract

F-18 fluorodeoxyglucose (FDG) is a highly influential radiotracer that provides valuable information in many cancer types. However, the normal biodistribution of F-18 FDG is often variable and can be altered by intrinsic or iatrogenic factors. We report a case of diffuse symmetrically increased skeletal muscle uptake and relatively decreased hepatic uptake on F-18 FDG PET/CT in a 57-year-old female with pulmonary adenocarcinoma. Detailed clinical evaluation and retrospective radiologic evaluation revealed that she had been diagnosed with subacute thyroiditis 2 weeks ago. After 6 weeks, F-18 FDG distribution was normalized at the follow-up PET/CT study.

Keyword

F-18 FDG; Hyperthyroidism; PET/CT; Subacute thyroiditis

MeSH Terms

Adenocarcinoma
Female
Follow-Up Studies
Humans
Hyperthyroidism
Middle Aged
Muscle, Skeletal
Positron-Emission Tomography and Computed Tomography
Retrospective Studies
Thyroiditis, Subacute*