Reactive Unilateral Axillary Adenopathy Following COVID-19 Vaccination

A small, but not insignificant number of people develop unilateral axillary adenopathy in the days following vaccination against SARS-CoV-2, the virus that causes COVID-19. Diagnostic radiologist Laura Dean, MD, explains that these nodes can be palpable and visible on screening mammograms. Follow-up is required, but the condition is often a natural immune response that resolves on its own.