Seven-month persistence of COVID-19 vaccine-induced lymphadenopathy: a case report

After reviewing the history, imaging, and pathology, it was concluded through a diagnosis of exclusion that the observed enlarged left axillary lymph nodes with reactive histology were probably related to the coronavirus disease-2019 vaccine administration and not to ductal carcinoma in situ or an undetected invasive cancer. Clinicians and radiologists need to be aware of the potential for abnormal presentations of persistent lymphadenopathy that may interfere with the diagnosis and follow-up of cancers.