Slightly enlarged mediastinal node on car scan... is this significant? i have stage 2b breast cancer, her 2 positive and recent pulmonary emboli

This may significant: This can be a be a very significant finding. Although biopsy may be indicated, other imaging will probably be ordered first. Certainly, do not drop the ball and follow through on your doctors recommendations.

Observe: Most likely it's not but you should get a follow up scan in 3 months but if you can get approval a pet scan may be helpful.