COVID-19 Vaccine & Mammography

As more women get vaccinated against COVID-19, some may develop swollen lymph nodes under their arm on the same side as their vaccine injection. Axillary lymphadenopathy or axillary adenopathy is the medical term referring to the change in size and consistency of lymph nodes in the armpit, also called the axilla. This is a normal immune response to a vaccine. The swollen lymph nodes usually return to normal on their own in a few days or weeks. Below are some frequently asked questions about the COVID-19 vaccine and mammography.


Frequently Asked Questions

Why do swollen lymph nodes matter?

Breast radiologists look closely for any changes on your mammogram. Swollen lymph nodes under one arm can be seen on a mammogram and can be a rare sign of breast cancer.

What happens if there are swollen lymph nodes on my mammogram?

Depending on your medical history and when you received your vaccine, the breast radiologist may recommend that you return to the breast center for an ultrasound of your underarm area. They may also recommend a follow up exam to show that the lymph nodes have returned to normal size.

When should I schedule my screening mammogram?

Try to schedule your screening mammogram before your first COVID-19 vaccine dose or at least 4 to 6 weeks after your last dose. This reduces the chance that swollen lymph nodes from the vaccine will appear on your mammogram.

What if my mammogram is already scheduled?

Keep your vaccination appointment. Getting vaccinated is critical to stop the spread of COVID-19. Consider rescheduling your screening mammogram if possible before your vaccine. However, if you are already overdue for your screening exam or cannot reschedule within the next few months, keep your screening mammogram appointment and vaccine appointment. Regular screening mammograms ensure that breast cancer is detected as early as possible. Both are very important to ensure that you stay healthy.

What should I tell the technologist on the day of my screening mammogram?

Notify your mammography technologist if you have received a COVID-19 vaccine. Tell her when you received the vaccine, and which arm the vaccine was given. State whether it’s your first or last dose. This information will help the breast radiologist interpreting your screening exam.


Close Close Warning Message

Sign In

Close Warning Message