Lymphe node status remains the most important prognostic factor in bre
ast cancer However only 70% of the node negative breast cancer patient
s are alive al 10 years. Several randomized trials have shown that sys
temic adjuvant therapy, either chemo or hormonotherapy, increases surv
ival in these patients. A recent meta-analysis confirms these findings
. In 1992, a consensus conference recommended no therapy in low risk p
atients (tumor size less than 1 cm), tamoxifen in good risk patients (
tumor less than 2 cm, oestrogen or progesteron receptors positive, wel
l differenciated) and chemotherapy in premenopausal or hormonotherapy
in postmenopausal high risk patients (receptor-negative less than 1 cm
tumor or high pathological grade).