From the size of the tumor, it looks like your friend is most likely stage 2, but that could change if there is spread to lymph nodes or chest wall. Here is a chart on tumor staging:
http://ww5.komen.org/BreastCancer/TumorSizeandStaging.html" rel="nofollow - http://ww5.komen.org/BreastCancer/TumorSizeandStaging.html
This is the NCCN Guidelines for Breast Cancer. It's a comprehensive guide from diagnosis to treatment:
https://www.nccn.org/patients/guidelines/stage_i_ii_breast/index.html" rel="nofollow - https://www.nccn.org/patients/guidelines/stage_i_ii_breast/index.html
The most common therapy in the US is dose dense AC followed by T, or T followed by AC. There are other regimens and even studies about adding Carboplatin to T improves outcome with neoadjuvant treatment. Here are few couple of links to look at:
https://www.nccn.org/patients/guidelines/stage_i_ii_breast/index.html#54" rel="nofollow - https://www.nccn.org/patients/guidelines/stage_i_ii_breast/index.html#54
http://forum.tnbcfoundation.org/adding-carboplatin-increases-pcr_topic11688_page2.html" rel="nofollow - http://forum.tnbcfoundation.org/adding-carboplatin-increases-pcr_topic11688_page2.html
http://tnbcfoundation.org/state-of-the-art-tnbc-treatment-brochure/" rel="nofollow - http://tnbcfoundation.org/state-of-the-art-tnbc-treatment-brochure/
http://www.cancernetwork.com/oncology-journal/new-therapeutic-strategies-triple-negative-breast-cancer" rel="nofollow - http://www.cancernetwork.com/oncology-journal/new-therapeutic-strategies-triple-negative-breast-cancer
------------- DX IDC TNBC 6/09 age 49, Stage 1,Grade 3, 1.5cm,0/5Nodes,KI-67 48%,BRCA-,6/09bi-mx, recon, T/C X4(9/09) 11/10 Recur IM node, Gem,Carb,Iniparib 12/10,MRI NED 2/11,IMRT Radsx40,CT NED11/13,MRI NED3/15
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