After my diagnosis in 2013 and to this day I get a copy of every report from the doctor, the labs etc and I make sure I understand every word on the reports, especially the pathology. Knowledge is power and the more you know about the unique characteristics of your cancer, the more powerful you will be to know what treatment might be best for you and all the different treatments that are out there. It is not a one size fits all. And it is up to us to make sure that our doctors give us all the information on OUR BODIES. If they don't, we need to ask. Wishing you the best.

I also have dense breast and my 2.9 cm tumor was missed (their error), and it was easily detected on an ultra sound which I insisted they do every checkup. Have you had an ultra sound?

Ask your doctor exactly what type of cancer you have Herceptin is part of it but you want to know what stage and what does what else is with it

Mammograms don't always show all of the tumors I had 15 of them that were cancerous and the only way they found them was to remove my breast

Are you Estrogen and Progesterone positive as well as Her2Neu positive? Is it in your lymph nodes, as the doctor only said stage 2 and not 2A or 2B? There are other things which would show on your pathology such as the size of your tumor, your K67, Luminol A or B, IDC as opposed to DCIS, lymphatic vascular or not, Estrogen Progesterone negative or positive. Metastatic breast cancer is stage 4, which means that the breast cancer has been found in other parts of your body, i.e. bones, liver, lungs or brain. What was the doctor trying to tell you with the package information he gave you on Her2 positve/metastatic cancer? I hope that you are able to ask your doctor these things and get some clarification. Hang in there and my best to you whatever decisions you make to regain your health.