[The problem of treating breast cancer by limited surgery (author's transl)].

The value of radical mastectomy in treating cancer of the breast has been questioned by some authors. With regard to the results published and on the basis of our own experiences limited operations without or with additional radiotherapy cannot be considered to be reliable procedures at present: it is only possible to approximately equal results by a strict case selection. With special cases such as in-situ carcinoma or small well defined cancers with beginning infiltration being expected there is no real basis for the indication to limited surgery in a single case. With the increase of small prognostically favourable cancers and border-line cases due to improvement of early detection more attention should be devoted to the problem of treating breast cancer by limited operations.