What kind of chemotherapy

My mother had a mastectomy surgery on 18th Feb.The biopsy 15 days before that resulted:
invasive :NOS type,gradeIII 2.5 cm
insitu:comedocarcinoma with extension into lobules
minimal tumor in invasive
minimal tumor calcification in insitu
no vascular & perineurial invasion.
All stomach area normal reported after sonography
Microscopic diagnosis:Esterogen &progesteron receptors negative
P35 negative
C-erb-B2 strongly positive
cathepsin D posive
Diagnosis after surgery:
no remnant of tumor
reactive changes in the site of biopsy(foamy macrophages foreign body type giant cells ,fibrosis,chronic inflammation
nipple & skin free of tumor
5 out of 5 dissected lymph nodes free of tumor
all surgical margins free of tumor
Please advise me what kind and what duration of chemotherapy is neded for her ASAP.

Thanks for your kind and prompt reply.

[CCF-RN,MSN-JS]

Dear rozita, Adjuvant therapy is generally recommended for her stage of cancer (Stage II - tumor greater than 2cm, negative lymph nodes, no evidence of metastasis).  Adjuvant therapy is given after surgery to try to prevent or minimize the growth of microscopic deposits of tumor cells that might grow into a recurrent tumor.  Chemotherapy would most likely be recommended for this, as her estrogen and progesterone receptors are negative. This chemotherapy is usually given as a combination of drugs, there is some variation to the specific drugs given and the timing of cycles, so her oncologist will discuss the specifics for her case.  The oncologist takes into account her specific situation -overall health, medical history, physical exam etc, to decide the treatment plan.  Treatment lasts four to six months in most adjuvant programs.  As she has had a mastectomy, lymph nodes are negative, and no remnant of tumor is remaining radiation therapy is not necessary.