Hi Lylneenz,
You and I have similar cancers: I was diagnosed in Jan 2014 with 2.2cm of IDC in a 6cm field of DCIS, no nodes involved, no metastases. Had Docetaxel, Carboplatin and Herceptin treatment and am now NED, and so far everything is looking good
I am sorry you have joined this club, and totally understand the terror etc of being at this point of things, and the desperate need for facts. When I was diagnosed , my oncologist said that 10 yrs ago, a diagnosis of HER2+ cancer was bad news, but that now, if you are going to have breast cancer at all, it is a pretty good one to get because the new targeted treatments make it so much more curable, and even with metastases it is much more effectively treatable that some other cancers. She said that with mastectomy and Chemo, my chance of recurrence in 5yrs was less than 2%, but without the Chemo and targeted treatment, that would have been about 40
50%.
Just came across some research about lymphovascular-invasion and prognosis:
http://www.cancertherapyadvisor.com/...rticle/252341/
that says having LV1 is similar prognosis to 1 or 2 positive nodes, and it increases the chances of local recurrence a bit. If they can target LV1 with radiotherapy in the same way they can target positive nodes, radiotherapy would probably make sense. But if they cannot target the LV1 radiotherapy may not be much use. And on the other hand if the targetted treatments hit LV1 growth hard anyway, you may not need the radiotherapy. These would be questions to get answers to.
Please do remember, either way, you still have an extremely high chance of kicking this cancer out of your system for good. Yes you have breast cancer, but it is now often a chronic illness or even a curable illness, not a death sentence. And I wish you all the best.