[Surgical tactics in precancerous conditions and non-invasive cancers of the breast].

In the treatment of non-palpable lesions of the breast, geometric localization technique with subcutaneous segmental mastectomy and intraoperative specimen radiography proved to be safe. Permanent sectioning of the whole excised area is recommended to improve the reliability of diagnosis. If breast biopsy establishes proliferative mastopathy with cell atypia or papillary proliferation, a strict clinical follow-up of the patient is adequate. When lobular neoplasia is detected, both breasts are in danger of developing carcinoma. In the treatment of this lesion, the calculated risk of life-long follow-ups may sometimes be an acceptable alternative to the certain cure by (subcutaneous) mastectomy. Yet, for treatment purposes intraductal carcinoma, with its risk of occult infiltration, should be considered potentially invasive.