Our breast clinic doesn't advise waiting but simply alerting the tech. The vaccine may cause swollen lymph nodes but no other changes to the breast tissue and therefore shouldn't impede reading a mammogram or u/s. If they see enlarged nodes then they know it's vaccine related if you've disclosed recent vaccine. Here's from the clinic's newsletter:
"Enlarged lymph nodes in the underarm after the COVID-19 vaccine
Stamatia Destounis, MD
A side effect of COVID-19 vaccination can be swollen lymph nodes in the underarm on the side where the COVID-19 vaccination was given. This is seen now about 15-20% of the time after the first and or second vaccination dose. These lymph nodes may be large enough to be found on a breast exam by you or your doctor or seen on your screening mammogram. There is no reason to worry as our breast imaging physicians are very familiar with lymph node enlargement with other vaccinations including for the flu, or shingles, and with infections that involve the breast, chest, or arm.
During the COVID pandemic many women may have delayed their screening mammograms for safety reasons, however, we don’t want you to skip your yearly mammogram. We also don’t want you to postpone your COVID vaccination if you have it scheduled as both are important for your health. Our staff and physicians will be happy to answer any questions you may have about your appointment."
Mom to two amazing DDs ('07 & '09) and a fur baby.
Gluten free since Nov '11 after non-celiac gluten sensitive diagnosis. Have had great improvement or total elimination of: migraines, bloating/distention, heartburn, cystic acne, canker sores, bleeding gums, eczema on elbows, dry skin and scalp, muscle cramps, PMS, hair loss, heart palpitations, fatigue. I'm amazed.