From the Department of Radiology, University of British Columbia.
Clin Nucl Med. 2021 May 1;46(5):437-438. doi: 10.1097/RLU.0000000000003636.
Vaccinations can cause hypermetabolic axillary lymphadenopathy on FDG PET. We present the case of a 71-year-old man who underwent FDG PET/CT for melanoma staging 6 days following a COVID (coronavirus disease) vaccination. Imaging showed a prominent intramuscular mass at the vaccination site, in addition to extensive axillary lymphadenopathy. The mass was compatible with a hematoma at the vaccination site, and the lymphadenopathy was most likely reactive. This case demonstrates unconventional findings in response to a routine vaccination event-findings that, in light of current world events, are likely to be routinely encountered on PET imaging and that should be recognized reactive rather malignant.
疫苗接种可导致 FDG PET 上的代谢亢进性腋窝淋巴结病。我们报告了一例 71 岁男性患者，他在接种 COVID（冠状病毒病）疫苗后 6 天行 FDG PET/CT 检查以进行黑色素瘤分期。影像学检查显示接种部位有明显的肌肉内肿块，此外还有广泛的腋窝淋巴结病。该肿块符合接种部位血肿，而淋巴结病很可能是反应性的。该病例展示了常规疫苗接种事件的非常规表现，鉴于当前的全球事件，这些表现很可能在 PET 成像中经常遇到，应识别为反应性而非恶性。
