Conservative surgery, i.e. tumorectomy with lymph nodes ablation and radiotherapy or Iridium 92, has replaced completely mastectomy in limited forms of breast cancer (stage I or II less than 3 cms) with the same results for mid and long term But contradictions must be known: large lymph nodes, aged women, evolutive forms, recurrences after conservative surgery and also intra canal multi foci forms. These forms must impose secondary mastectomy as first treatment.