Hi Christel:
I don't have any advise on your specific situation. I do wonder why you are after a bilateral mastectomy if you had disease in one breast and a node (with possible others??) and you are BRCA negative. I understand you are concerned about other nodes, did you have a breast MRI or other studies done prior to your lumpectomy?
Now is a great time to sort through all of this as you are in chemo for the next several months. I spent my chemo time (last one tomorrow!!) learning so much about my treatment and disease.
I have Grade 2b TNBC in my left breast with one positive node (MRI appears clean on others but will have to wait until surgery to know) and am BRCA1 negative, BRCA2 negative with two unclassified variants on BRCA2. My tumor has shrunk significantly during chemo (4x AC and 12x Taxol/Carboplatin) and will be removed next month. My surgeon is very happy with lumpectomy and would prefer to conserve as many nodes as possible depending on what she finds when she removes the sentinel node.
Good luck with the rest of your chemo and sorting through all your best options for surgery. My surgeon was only ever agreeable to mastectomy in the event I was BRCA positive.
Cheers,
Yvette