what's my chace of survival if i don't  take Tamoxifen after  lumpectomy follwed by chemo -6 cycl & radiation I am 47 yr.old unmarried woman. i have been advised 5 years of tamoxifin after a stage 1 lumpectomy,with lymph node removal(total 30 nodes removed.all -ve) breast cancer(hormone +ve) operation in April 05.I've also taken 6 cycles of chemo followed by 30 sittings of radiation.I just don't want to take any medicine now like Tamoxifen or Arimidex after this.What are my chances of disease free survival if I don't take it? My mother & my maternal aunt had breast cancer too way back in 1978 & 1959 respectively,they both were operated that time & were also given radiation.They both never had any recurrence & lived 20years of normal life after cancer & later both died of heart attack.Is it a must that I  take some medicine?

Summarized question: Will taking Tamoxifen  for 5 years after completing chemo and radiation  after a stage 1 lumpectomy, with lymph node removal improve my chance of survival?