Fig 1.

55-year-old clinically asymptomatic woman with COVID-19 vaccine-induced lymphadenopathy. (1a) Screening mammogram mediolateral oblique view from 2020 demonstrating no right axillary lymphadenopathy. (1b) Screening mammogram mediolateral oblique view in 2021 – with patient reporting history of COVID-19 vaccination in the right deltoid 3 weeks before – reveals an enlarged, abnormal axillary lymph node. Otherwise, no suspicious mammographic abnormalities are identified in either breast. (1c) Patient returns for diagnostic ultrasound evaluation 5 days after abnormal screening mammogram. Sonogram shows multiple abnormally enlarged lymph nodes with prominent eccentric cortices. Of note, there is some preservation of the fatty hila. (1d) The patient returns in 5 weeks for short-term diagnostic mammogram follow-up which reveals a return of normal appearing axillary lymph nodes and a recommendation to return to normal screening mammography.