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Updated: Nov 2, 2025

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates
Published on: September 5, 2017
COVID-19 vaccination may cause FDG uptake beyond axillary area
Vincent Fleury1, Bruno Maucherat1, Daniela Rusu1
1Department of Nuclear Medicine, ICO Gauducheau Cancer Center, Boulevard Monod, 44805 Saint-Herblain Cedex,, France.
Background:
The vaccination immune response may induce false-positive 18F-FDG PET/CT uptake.
Case Presentation:
An extended supraclavicular lymph nodal activation after coronavirus disease 2019 (COVID-19) vaccination revealed on 18F-FDG PET/CT mimics a Virchow nodule in a patient with medical history of well-differentiated appendicular adenocarcinoma.
Conclusion:
This case highlights a nodal activation beyond axillary area and the importance of documenting vaccination history at the time of scanning to avoid false-positive results.
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