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False-positive hypermetabolic lesions on post-treatment PET-CT after influenza vaccination
Jeong-Eun Kim1, Eun Kyoung Kim, Dae Ho Lee
1Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
Abstract:
We report a case of a 59-year-old man with testicular germ cell tumor who showed new hypermetabolic lesions at the left axillary lymph nodes on a post-treatment positron emission tomography-computed tomography (PET-CT) scan. The hypermetabolic lesions were found to be caused by an influenza vaccination 10 days prior to the PET-CT scan and disappeared without additional treatment. To date, he is alive with complete remission.
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