![]() ![]() There was no palpable abnormality in either breast or axilla. She had undergone resection of an ascending colon carcinoma 6 years previously, partial liver resection due to metastatic colon cancer 3 years previously, and partial resection of the right lung assisted with a thoracoscope due to metastatic colon cancer 2 years previously. We also present a literature review of studies of cases receiving a third or fourth COVID-19 vaccination.Ī 64-year-old woman came to our breast surgery clinic after a screening mammography abnormality in July 2021. Here, we present a case with axillary lymph node swelling, observed by ultrasonography (US), which was thought to be related to a third COVID-19 vaccination. In cases of axillary lymph node swelling, breast oncologists should consider whether these swellings are metastases of breast cancer or a side-effect of the vaccine. In addition, local lymph node swelling can also occur after these vaccinations ( 3). These vaccines have characteristic side-effects including fever, general fatigue, injection-site pain, and swelling ( 2). Indeed, Japan is planning to administer a fourth COVID-19 vaccination ( 5). Currently, a third vaccination is indicated for those who received a second vaccination more than 6 months previously, and further vaccination might be needed. In Japan, the third vaccination started in December 2021 ( 4). However, this pandemic has continued for 2 years, and therefore booster vaccinations have been required to prevent COVID-19 infection because antibody levels to the virus decrease within several months. When these vaccinations were started, clinical trials of BNT162b2 and mRNA-1273 ( 2, 3) were designed to administer two doses. BNT162b2 and mRNA-1273 are mRNA vaccines and this is the first time this type of vaccine has been used in a clinical setting. During this pandemic, COVID-19 vaccines, such as the BNT162b2 vaccine (Pfizer) ( 2) and mRNA-1273 vaccine (Moderna) ( 3), have been developed rapidly, and in many countries, including Japan, vaccination with these vaccines has been performed. Two years later and the pandemic has become global. Pneumonia caused by the novel coronavirus, called Coronavirus Disease 2019 (COVID-19), was first reported in Wuhan, China in December 2019 ( 1). Therefore, breast oncologists will have to consider this side-effect of COVID-19 vaccination when diagnosing breast tumors. At her next visit, by chance, she underwent ultrasonography 14 days after she received a third COVID-19 vaccination, and a swollen axillary lymph node was observed.Ĭonclusion: Axillary lymph node swelling can occur after a third COVID-19 vaccination. At 2 months after her second COVID-19 vaccination when she underwent these tests, she had no axillary lymph node swelling. She had no palpable mass, but a left breast mass was shown by mammography, and ultrasonography and magnetic resonance imaging indicated a hamartoma. We have also reviewed the literature regarding this side-effect after a third or fourth COVID-19 vaccination.Ĭase Report: A 64-year-old woman who came to our clinic regarding a mammography abnormality in her left breast. Here, we present a female case who developed axillary lymph node swelling after her third vaccination. Initially, only two COVID-19 vaccinations were planned however, in some countries third or fourth vaccines have been administered. The COVID-19 vaccination can cause specific side-effects, such as axillary lymph node swelling therefore, breast oncologists should pay attention to such occurrences. ![]() Background/Aim: COVID-19 has been a global pandemic for more than 2 years, and vaccination against COVID-19 using an mRNA vaccine is widespread.
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